Removes use of the special framework-modules naming scheme.

Bug: 155164730
Test: m java
Exempt-From-Owner-Approval: Build cleanup.
Change-Id: I3896d7c91e937f503b49f5df011c21ee51219652
Merged-In: I0c31e2183353dfb5bd49f04f3455cb7b10be6866
Merged-In: I3b78fcbcacc3df787e171d6eedeef1e51b087615
(cherry picked from adac7d2c)

Switching from java_library to java_sdk_library switched the meaning
of the module name from referring to the implementation library to
referring to the stubs. This change updates the visibility rules to
reflect that new meaning.

Visibility rules that were previously set for the java_library have
been moved to the impl_library_visibility property and the special
//visibility:override value has been prepended to prevent it from
inheriting the values from the visibility property.

Visibility rules set for the stubs (via stubs_library_visibility)
property have been moved to the visibility property.

Bug: 155164730
Test: m nothing
Exempt-From-Owner-Approval: Build cleanup
Change-Id: Icc9bc5a9ef86cf7ba0f15c2b2a4abd596ec9f640
Merged-In: Icc9bc5a9ef86cf7ba0f15c2b2a4abd596ec9f640
(cherry picked from a17cf677)

* changes:
  Make tethering module to use netd_aidl_interface-unstable-java
  [BOT.5] Move class Ipv6ForwardingRule from IpServer to the coordinator
  [BOT.3] Add unit test for polling network stats in the coordinator
  [BOT.2] Create a coordinator and stats provider to provide tether stats
  [BOT.1] Add a class ForwardedStats in TetheringUtils

Use unstable aidl for new api tetherOffload* and modified
parcel TetherStatsParcel in BpfCoordinator{, Test}.

Bug: 150736748
Test: m

Change-Id: I2d2cedf560319653f67f6b06f7abb0bf66eba91a

This is a preparation for moving adding/removing forwarding rules from
IpServer to BpfCoordinator.

Bug: 150736748
Test: atest IpServerTest
Change-Id: I85316ef09ff3c9389ded11dcc384493d699da48e

Verify that the coordinator could fetch tether stats from BPF maps and
report the network stats to the service.

Bug: 150736748
Test: atest BpfCoordinatorTest
Change-Id: Ib1756159a2047c5db7d31359b0f288f840bd1bb1

Make BPF tethering offload coordinator, BpfCoordinator,
registers a network stats provider, BpfTetherStatsProvider, and
provide the tethering stats from the BPF map.

Bug: 150736748
Test: new test BpfCoordinatorTest

Change-Id: I22e71f87b67668f7e733e4f215d93bf5b2c9380d

Used to record offload transmitted/received forwarded bytes/packets.

Bug: 150736748
Test: new test BpfTetheringCoordinatorTest
Change-Id: Ie8725f95c3ddd5fb3811d479de32d2c1f7dcb493

Shell has TETHER_PRIVILEGED permission. To avoid any service to adopt
shell identity by lunching service with Shell process, gate
exemptFromEentitlementCheck by NETWORK_STACK.

Bug: 157702014
Test: atest TetheringCoverageTests
Change-Id: I6ddfda23d36ea9981e3e1eb5a87767f452a65852

KClass#getSimpleName need refer to kotlin-reflect.jar which need
include it in Andorid.bp. However, it's not necessary to use
KClass#getSimpleName but use Class#getSimpleName instead.

Test: atest TetheringTests
Bug: 157527499
Change-Id: I49bc336a276d30152402eba926cc583bc81e8e5c
Merged-In: I49bc336a276d30152402eba926cc583bc81e8e5c

The names of the individual modules do not quite follow the pattern
that java_sdk_library uses so this temporarily sets the following:
    naming_scheme: "frameworks-modules"

That causes java_sdk_library to use a naming scheme that matches the
one used by the individual modules of this. It will be cleaned up
later.

Part of the purpose of the java_sdk_library is to hide the
implementation code and force users of the library to depend on stubs
for a well defined API. Ideally, it would allow access to the
implementation in those cases where it is safe, e.g. from within the
same APEX, or from tests for the implementation. Unfortunately, due to
limitations in the build it does not yet have enough information to
make that decision correctly which means that any code that needs to
compile against the implementation is broken which would prevent us
from converting the module to java_sdk_library.

However, the only way to provide the additional information to allow
the implementation to be correctly exposed is to convert the modules
to java_sdk_library; a cycle.

In order to break that cycle the java_sdk_library creates a special
<module>.impl target which is used directly by tests and any other code
that needs it. Once all the modules have been converted to a
java_sdk_library then we can resolve the limitations in the build and
remove the direct references to <module>.impl.

Test: m update-api
Bug: 155164730
Merged-In: If5c115f482751f9f4b5f047e9e401a18e36799ef
Merged-In: Id1c2e848430c49a2da7402244814cd084f5da77c
Change-Id: Id1c2e848430c49a2da7402244814cd084f5da77c

Extend the timeout to lower the EthernetTetheringTest flaky.

Besides, also explicitly exempt entitlement check in
EtetherntTetheringTest because it do not test tethering upstream
currently. Thus, the tests would not be interrupted by entitlement
check if test SIM is entitlement required.

Bug: 156713866
Test: TetheringCoverageTests, CtsTehteringTest

Change-Id: I45e8e8d737486def9d0de8943ec7f09ca0942a0b

- Add New class PrivateAddressCoordinator to coordinate the private
  address conflict problem.
- Downstream prefix would be random in 192.168.0.0/24 ~
  192.168.255.0/24.
- If new upstream prefix is conflict with existing downstream prefix,
  downstream would be kicked out and it would request a new one.
- The last conflict upstream prefixes would be blacklist. Avoid to
select downstream prefix which is conflict with prefixes in blacklist.

Bug: 130879722
Test: -build, flash, boot
      -atest TetheringTests

Change-Id: Ib45b87bcd9eeb5da03fb7ec90b1af9ca53998cf5

Bug: 156866746
Test: atest TetheringTests, TetheringCoverageTests
Change-Id: I7c539f1f4a447b5913164b222601c6113c6fe645

If upstream is cellular, set the TTL in Router Advertisements to
"network-set TTL - 1" for carrier requirement. For other non-cellular
upstream, set TTL as "network-set TTL + 1" to preventing arbitrary
distinction between tethered and untethered traffic.

Bug: 154776299
Test: atest TetheringTests

Change-Id: I7f2696a642f96c6aafb5613b980bf5bcdd08bbda

AdoptShellPermissionIdentity can not pass permission check by
Settings#checkAndNoteWriteSettingsOperation. It would compare the caller
uid and its package name. See error below:
1. java.lang.SecurityException:
Specified package com.android.shell under uid 10239 but it is really 2000
2. java.lang.SecurityException:
uid 10245 does not have android.permission.UPDATE_APP_OPS_STATS.

Override the method and test if caller hold WRITE_SETTINGS directly.

Bug: 154869719
Test: TetheringTests, TetheringCoverageTests, NetworkStackNextTests,
NetworkStackCoverageTests

Change-Id: I2a60c4d66ef30028f9663159f85464ea815248e2

Bug: 154869719
Test: atest TetheringTests
Change-Id: I7beea3f011d930e433443ed62d772a3f8cce5d78

Bug: 156557122
Test: atest TetheringTests

Change-Id: Id9c0397306f3872fc23520d1354f338035a96dc9

Add the specific implementation of onNewPrefixRequest callback
on IpServer side, also refactor some common code.

Bug: 130741856
Test: atest TetheringTests
Change-Id: If2871bf899cb5890bbfee18063a194c92b6f474e

1. Move isTetheringSupport logic from TetheringService to Tethering.
2. Small readability improvement in TetheringTest. Also change
config_tether_upstream_automatic from false to true in TetheringTest.
So TetheringTests would default run automatic select upstream flow
instead of selecting by legacy perferred network type list.

Bug: 153609486
Test: atest TetheringTest
Change-Id: I5a82a6347f62d3a7031db5c56e8e0c8530dafd8f
Merged-In: I5a82a6347f62d3a7031db5c56e8e0c8530dafd8f

Merge the otherwise unused tethering-aidl-interfaces into
framework-tethering.

This is in preparation for converting to use java_sdk_library.

Bug: 155164730
Test: m droid
Change-Id: I4583539d11ba69320aa5a0dfcfee072c81affac2

Bug: 145490751
Test: atest TetheringTests

Change-Id: Ia402a6caaa0dfaa05d25a02101c515bbd884d33f

- Correct description and spelling in the code and xml files.
- Add a TODO for refactoring the IpServer constructor.
- Refine the if-statement for starting IP neighbor monitor.

Test: atest IpServerTest
Change-Id: If9c8bc6f785fa80575db56de4e223292e9807ace

* changes:
  Use device option to control BPF offload features
  Add tether BPF offload config to device config and resource

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

InProcessTethering is a part of com.android.tethering.inprocess,
therefore min_sdk_version is set.

Bug: 145796956
Bug: 150999716
Test: m
Change-Id: I655211e0b9aa4bd7cb3718b6f567f0aa1a0176a5

To exempt from entitlement check, caller need to hold TETHER_PRIVILEGED
permission.

Bug: 141256482
Test: atest TetheringTests

Change-Id: I2eb37f5e92f5f5150a7fb7c25b945e28704d27a0