Currently, Ipv6UpstreamRule is added follows the adding of
Ipv6DownstreamRule when it is the first rule from a downstream
interface to the upstream interface.

This CL changed it to:
1. Upstream interface change updates both IPv6 upstream and downstream
   forwarding rules.
2. Neighbor events updates only IPv6 downstream forwarding rules.

Data limit setting on the upstream interface is now depend on the
upstream rules instead of the downstream rules. This CL also updates
corresponding test cases in IpServerTest and BpfCoordinatorTest.

Test: atest TetheringTests
Bug: 261923493
Change-Id: I5b4df64a3d276afb7a24bbef3a0432f53377e8b2

In current code, IpServer will ensure bpf offload is supported before
calling BpfCoordinator's APIs. But those APIs already have the same
checks inside the function. This CL removed duplicated checks in
IpServer.

After this change, the BPF offload support status is only determined
inside BpfCoordinator and it won't change during the life cycle of
Tethering. Tethering initializes mBpfCoordinator just once in the
constructor. After that point, the value of isUsingBpf can never
change, because mIsBpfEnabled is final and
mBpfCoordinatorShim.isInitialized() is either always true (api30) or
can either never change (api31).

Also fixed a bug in IpServerTest upon this change.

Test: atest TetheringTests
Bug: 261923493
Change-Id: I50f231a83bf678b90eae4fd9bfa6035e86978bb3

The original code requires updating mLastIPv6LinkProperties before
calling updateIpv6ForwardingRules because mLastIPv6LinkProperties will
be used inside an internal function later. Remove this unnecessary
dependency by passing the interface name into the function.

Bug: 294025403
Test: atest TetheringTests
Change-Id: I5699fba3d7caf3314d102b643b02da2b2797dd66

VS Code is useful for lite and/or remote edit.

Test: none
Change-Id: I4584f4dc176d8816e1abea4a73ce12d556ee5aa6

* changes:
  Report sent query count
  Report service info callback metrics data

Add RemoteAuthService APIs and Stubs (hide) for Settings of D2DA

This CL introduces new SystemApi allow user to discover remote devices
compatible to be registered as remote authenticators via RemoteAuthManager

Design doc: go/remote-auth-manager-fishfood-design

Test: built successfully.
Bug: 290092977
API-Coverage-Bug: 294934095
Change-Id: Iaaae1126065fdc3db469eeb8d85ac654b8199a12

Replaced startUpstreamIpv6Forwarding and stopUpstreamIpv6Forwarding
with add/remove Ipv6UpstreamRule. This is a preparation for following
CLs which will pass the upstream's prefixes to the bpf map. We might
have more than one upstream rules.

Also renamed Ipv6ForwardingRule to Ipv6DownstreamRule since we have
defined the Ipv6UpstreamRule.

No logic changes are being made in this CL.

Test: atest TetheringTests
Bug: 261923493
Change-Id: I022f97c2daf468bbd4a4279a069ccf498013e7e7

Test: TH
Bug: 293965195
Change-Id: I178a9904d2ee090ed1fb487c061226909cbde1d6

Followup CL for aosp/2700076

Bug: 296972712
Test: build with aosp/2688146
Change-Id: I617b330c42a99e4c839adac2ea614756b5955ce9

Keeping the function names inline with the naming of the IpClient
callbacks makes the code more searchable / readable.

Also marking them as private.

Test: TH
Change-Id: I1c0a9307dee7c90460633a79e3560a5b5f791c32

* changes:
  ethernet: clean up EthernetManagerTest
  ethernet: test adding listener after removing server mode iface

Bug: 281639507
Test: TH
Change-Id: I754c3581438d716d2156b80e4ce29b3f2adf76d4

Bug: 296211911
Change-Id: Ifd4f7cd06f1aeaba739d27d2328e89031ca73235

createChangeEvent is not expected to be called from a test, so make it
private. Also delete pollOrThrow as polling inline creates a better log
output.

Test: atest EthernetManagerTest
Change-Id: I2399960fee2c51fdf340186189ae83a20c4ac6f3

Tests that registering a EthernetStateListener functions as expected
after requesting a tethering interface and subsequently removing that
interface.

Test: atest testCallbacks_afterRemovingServerModeInterface
Bug: 290971780
Change-Id: I7b6e1a3b3ac23f4fbdd2d20f63f83d59c4d4999d

Test: N/A
Change-Id: I50101f9e5dc4dede5732a31da4ecd53d027adedc

Test cases are accessing wifi when WiFi feature not enabled.
This change skips the test from executing based on WiFi feature
availabiliy.

Bug: 262228635
Test: Executed all CtsNetTestCases tests on system with and without WiFi
feature

Change-Id: I97872cf7b73eed12dba064697150f09c81f494b6

Report the sent query count when the discovery is stopped.

Bug: 287546772
Test: atest FrameworksNetTestCases NsdManagerTest
Change-Id: I47b91c0c530eee2f00920ee5ea99e8d7b6e2e9ee

Bug: 287546772
Test: atest FrameworksNetTestCases
Change-Id: I630c0e4921f7acf42bf29812d9790ee5a894d60b

The platform doesn't allow overwriting compat flags that have target SDK
lower than the platform SDK in release build. Ignoring the test cases
that need compat flag overwrite up to S_V2 makes the MTS pass on S
device.

Bug: 296248982
Test: TH
Change-Id: Iab102725004c39b4dc3c0200c9bc673dd6be1302

Bug: 290265761
Bug: 291146480
Bug: 290275468
Test: None
Change-Id: Iaba64415cf81454b6e999f10bad54810884fc3da

Bug: 284972285
Test: m & atest NetHttpTests
Change-Id: Id24fa826f617187722b329821dae9d9548bf218b

The goal is to be able to remove getMap() from BpfMap.h,
as it effectively leaks (what should be an) internal fd.

In practice the dump() operation isn't useful,
as initMaps() and thus native_init() already
guarantee all these maps have valid file descriptors.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: If89c28923d3ae030dfac0b3b0ab8b15117db3f30

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Id3a128cd72f467fa60213f57c6dd942a0629ba1d