This is not required for code in the mainline module since the flag
infra is not supported for mainline. But we will need to write code
in UserManager and it needs to be guarded by new Thread flags.

Note that Merged-In is added to skip merging this CL into the
udc-mainline-prod branch because trunk stable flagging is not supported
there

Bug: 307679182
Test: m
Merged-In: I88c993680976d2e10d672bfdbf45119f2db13868
Change-Id: Id53fa3e7c9592b04f37f4cbd7dcd0499859e59ed

The ThreadPersistentSetting class can be used to read/store key value
pairs in ThreadPersistentSetting.xml file.

Bug: 299243765

Test: atest ThreadNetworkUnitTests:com.android.server.thread.ThreadPersistentSettingTest
Change-Id: I564ce8373e6af8f5cdf066a579bec46bfffecb72

Bug: b/309357909
Test: Run `atest ThreadNetworkUnitTests`.
Change-Id: I51c297a5c30fb114a6e3fb8b54cdbfef142001b3

Adds the Thread service unit test skeleton and make the services
testable.

Initially, a few trivial unit tests for existing APIs are added in
ThreadNetworkControllerServiceTest.java, and more tests will be added in
separate CLs later.

Bug: 317555104
Change-Id: I7b9e5f3663493d8da2448568de792e4272ee1df6

Bug: b/309357909
Test: Run `atest ThreadNetworkUnitTests`.
Change-Id: I087cc0fc2b6c21fd9d3d4607f30c194214aeb37e

This commented out line references the old robolectric ("Robolectric_all-target") which is being replaced by Robolectric_all-target_upstream

Bug: 314757990
Test: none, this is simply removing a commented out dep.
Flag: NA
Change-Id: I25eed6cef457bada06289656745ca5b5286bb467

This CL adds resource overlay support to allow developers to
change the default configuration of using the location country code.

Bug: b/311324956
Test: Set the resource overlay in cuttlefish, check the default
      configuration via the command `dumpsys thread_network`.

Change-Id: Ide853975e8244f06a382b2eda4844e030539b95d

This CL selects the Thread country code from location country code.
If the location country code is not avaliable, the country code `WW`
will be selected as the default Thread country code.

This CL also adds Shell commands for developers to override the Thread
country code for testing.

Bug: b/309357909
Test: Run `atest ThreadNetworkUnitTests`.

Change-Id: Id87c293005f0e75922a72854b40c41837b74397f

Test: TH
Change-Id: Idc661b6a2ca4ca25ea06e30cae87967a37e9c3fc

* changes:
  [Thread] use Context#enforceCallingOrSelfPermission
  [Thread] make InfraInterfaceController mockable

Context#enforceCallingPermission always throws SecurityException if we
are not processing a Binder IPC. This specifically doesn't work with
unit tests where the service APIs are called with mocked Binder
interfaces.

Bug: 317555104
Change-Id: I50be68487fb53907dbb1e3da7815fdf305047481

It's generally discouraged to mock a static method, so this commit
changes InfraInterfaceController#createIcmp6Socket to non-static method
and inject InfraInterfaceController into ThreadNetworkControllerService
as an external dependency.

Bug: 317555104
Change-Id: I6f88c02858279223684c781dc065a9bf84ae15ab

NsdService switched from Netd native solution to Java solution on
Android U. MDNS service provided by Netd will be removed from Android V.

1. Stop registering native mdns service from V.
2. Stop startDaemon() in NsdManager from V.
3. As a double safety, return early in NsdService methods that call the
   native mdns service when platform version is V+.
4. Modify NsdManagerTest to cover V+ behavior.

Bug: 298594687
Test: Build. Presubmit.
Change-Id: Ifdac8f7a44aa57d93d453ba482ec473a2b531452

* changes:
  [mdns] add tests for verifying address of mDNS reply
  [mdns] fix wrong NSEC answer for unique RRs
  [mdns] fix duplicated records for multiple questions

Log.wtf should avoid crashes, while making sure that one can still
notice if there is a problem.

In particular, it may be possible that calling ensureIpServerStopped
and ensureIpServerStarted could start forwarding before the previous
IpServer has stopped it.

Bug: 314260975
Change-Id: I047a673d2fe6f218192d3144fa0bd60ce8739a15
Test: TH

The first tethering test case might have a tethering restart when
handling IP conflicts. Currently, we start a hotspot once before
tethering, but the test is still flaky in Cuttlefish because it
doesn't support hotspots. Instead, we'll start ethernet tethering.

Bug: 254183718
Test: atest CtsTetheringTest
Change-Id: I695d4e1b3f961893bc30b3144faf7ad7d2d70574

Bug: 254183718
Test: atest CtsTetheringTest
Change-Id: Ie8bf908fc926a0b8b58559c8827951cbeaedc2c6

Bug: 265095929
Test: atest FrameworksNetTests
Change-Id: I3499fb9dfc24fec9648f9c97d6028c3fca4f925a

Existing MdnsRecordRepositiry#getReply will send a NSEC RR in the reply
when 1) a query for a unique RR is not found or 2) any unique name which is
included in the answer sections. The second one is not aligned with the
spec:

```
On receipt of a question for a particular name, rrtype, and rrclass,
for which a responder does have one or more unique answers, the
responder MAY also include an NSEC record in the Additional Record
Section indicating the nonexistence of other rrtypes for that name
and rrclass.
```

This commit fixes the issue in 2) by checking that all unique records of
the name are included in the answers before adding a NSEC record.

Bug: 265095929
Test: atest FrameworksNetTests
Change-Id: I0531fbccf98e69a50bb8a45e529caaed3ad80b59

Error:
========================================================================
[NewApi] Field requires API level 35 (current min is 33):
REGISTER_NSD_OFFLOAD_ENGINE

+ String.join(", ", List.of(REGISTER_NSD_OFFLOAD_ENGINE, NETWORK_STACK,
========================================================================

1. The REGISTER_NSD_OFFLOAD_ENGINE is only available on API level 35.
2. The error message in the exception is incorrect. It should be 3
   cases: V+, U, others.
3. Fix this Lint error because it will block aosp/2832130 merge.

Bug: N/A
Test: m; AOSP Gerrit Lint
Change-Id: I03730f5a9d2e6e3f6848f729bb4120b86194c705

Before making enableEthernetTethering a static function, make its
dependency variable static.

Bug: 254183718
Test: atest CtsTetheringTest
Change-Id: Id3781d67b3abc69b146fa704d4795bcfb2431a2a

This reverts commit c0baea54.

Reason for revert: Checking if culprit of b/317506400

Change-Id: Icbe9d993c6d4bfdf305f2a4c7b8422095c8846a6
Bug: 317506400

The duplicate entries make `CtsThreadNetworkTestCases` not included in presubmit. The `CtsThreadNetworkTestCases` was added in aosp/2804113 but was accidentally removed in aosp/2888526.

Bug: 317769267
Bug: 297729075

Test: presubmit

Change-Id: I184d21deddc0f0c247321a8d1afe5a8f8674f974