These tests were disabled from presubmit because of flaky test.
It's no longer flaky now, so add these tests back to presubmit.

Bug: 293233390
Test: atest FrameworksNetTests
Change-Id: I7f1f36385d2ca6ed210e1d9b7399b6509fd26519

When the device is very slow to run this test, cell might end
its lingering period in the middle of the test while wifi is
the default. VPN will then ignore it as an underlying network,
causing the test to fail.

Test: testVpnSetUnderlyingNetworks
      Added sleep in a strategic place to make sure the problem
      was correctly identified, and observed the test failing.
      After the fix, the test passes with the sleep.
Fixes: 280627836
Fixes: 293844384
Change-Id: Iaf56de963eb17845c1d76a0310b55f7f9321f7e4

Bug: 294326360
Test: atest FrameworksNetTests
Change-Id: I9a3a84f907362260bdcf6be19e2c4d5345788d2e

Move scheduling logic into a standalone MdnsQueryScheduler class to
simplify the MdnsServiceTypeClient class.

Bug: 292470176
Test: atest FrameworksNetTests CtsNetTestCases
Change-Id: I31130c239bc54f6dc0efde2921ce51df35076a74

This test assumes the data saver mode is initially disabled, but WearOS enables the mode on boot. This change fixes the precondition in the setUp method.

Test: run cts -m CtsHostsideNetworkTests
Bug: 280542664
(cherry picked from https://android-review.googlesource.com/q/commit:2cdeffc7e97a915a847cfc40d89e091aeadf20b3)
Merged-In: Ibcceaf0f44821100c861ef7b3c61d0888ae30481
Change-Id: Ibcceaf0f44821100c861ef7b3c61d0888ae30481

This change adds the nativeGetIfIndexStat JNI method, which can be used
to read the traffic stats associated with a specific iface index.

Test: Included unit test.
Bug: 241098920
Change-Id: I7a4adcb9610562ff01fe5cd1234d6dfc57f9408d

This change adds InitStats for explictly zero-initializing rx/tx
bytes/packets, and -1-initializing rx/tx tcp packets.

Test: Build, existing unit tests.
Bug: 241098920
Change-Id: Ib9598dab924b48240461b31906a4b5698db255d8

API-Coverage-Bug: 282618639
Bug: 269240366
Test: atest CtsNetTestCases
Change-Id: I7ac72b675ff3715891f31bc03c453e14b1264e40

Components that can provide offload like IpClient (packet
filter offloading) can use the API to register a callback to be notified
when offload is necessary.

Bug: 269240366
Test: atest CtsNetTestCases
Change-Id: I8080702f5b530001b88e79e504f4722ac01bc576

The MTU from the socket is a much easier way to get the
correct MTU to any given destination. In particular this
is important for CLAT which used to be wrong :
on my device, with a perfectly working GoogleGuest :
50: v4-wlan0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1472 qdisc pfifo_fast state UNKNOWN group default qlen 500

  F  ICMPv4 payloadLength{1472} dst{8.8.8.8} src{192.0.0.4:27}: FAILED: 0/15 (4811ms)

After this patch, the payload is correctly 1444.

Test: Manual on GoogleGuest
      Manual on a network with a custom set MTU
Change-Id: I6cd2398572b3fe08f88832ab6d0aa715c118cd4f

This change updates 'mBpfMap' to 'mIndexToIfaceBpfMap' to
better-describe what the bpf map contains. This is done as a
prerequisite change for adding a name->indices map.

Test: Build
Bug: 241098920
Change-Id: Idaab7072a14ea3c88e9a5df808e768f355d83782

Close the fd based on the automaticOnOffState increases the
complexity. Replace it with always dup the fd in the constructor.

Bug: 290094178
Test: atest FrameworksNetTests
Test: atest android.net.cts.ConnectivityManagerTest
Change-Id: I0133588c41dd6aca9f0ee0fcc8e4b4418e152284

This commit adds the version control for keepalive packet address
translation design to prevent device crash if the network stack
is not updated to a newer version. This commit also adds a
DeviceConfig to control the design in newer module version.

Bug: 291870956
Test: atest FrameworksNetTests CtsNetTestCases
Change-Id: Id4efbf51dae9154d2bc3a1ee405e2139d5c91e36

Test: This
Bug: 269409485
Change-Id: I6bfde26939e7cb5970f90fe5c663bcb55d3700d9

Follow-up from commit Ie60829a65d0d9b5b63ad353695a820c0586e3665,
the interface field was cleared before returning the result to
the caller. However, this can cause problems in the
NetworkStats#subtract method. If the interface field is cleared,
the findIndexHinted method can match to a wrong entry.
This is because the keys of multiple entries will now be the
same. This can cause the subtract result to be unexpectedly
large and the return value of getUidStatsForTransport to be
mismatched with the values retrieved from other APIs.

Test: atest FrameworksNetTests:android.net.connectivity.com.android.server.net.NetworkStatsServiceTest \
      FrameworksNetTests:android.net.connectivity.android.net.NetworkStatsTest
Bug: 290728278
Change-Id: I891ab29b8a2902663febc7c32b04417caf510926

aosp/2605757 updated isDefaultNetworkActive returns false when there is
no default network.
But this change was not merged to U release branch and this change was
not well tested by dogfooding.
So this CL reverts the isDefaultNetworkActivity behavior change.

Bug: 279380356
Bug: 291870075
Test: atest FrameworksNetTests
Change-Id: Id88662faea9eeaba93d59ab2729f6204a3631ab1

This is a no-op refactoring, which re-write the group by methods
to use a common method that can slice NetworkStats by a given
lambda. This is useful for subsequent changes to slice NetworkStats
with different conditions.

Test: atest FrameworksNetTests:android.net.connectivity.android.net.NetworkStatsTest
Bug: 290728278
Change-Id: Ia28571021fba46fc59380798053ccdc91ddc6ae4

Stub out code and test directories

BUG: 290094832
Test: atest FrameworksNetTests RemoteAuthUnitTests
Change-Id: I850242640f32bea3d46febcde5f3719619b1ea07

aosp/2605757 changed onNetworkActive callback behavior on U+ but this
change was not merged to U release branch.
This CL reverts the behavior change and keep the current behavior on U+.

Bug: 279380356
Bug: 291870075
Test: atest FrameworksNetTests
Change-Id: I91ccc7ee93f0827986401f316997b4a2df11318f

This commit updates test to
- Execute IkeSessionCallback inside executor. The callback should
  be called from executor in production code but test trigger the
  callback from test main thread which will result in unexpected
  code interaction.
- Verify the timer directly. The origin design verifies
  interactions with Captor with uncertain interaction. Test
  should be able to verify the schedule() calls with the expected
  timeout value. Also, in lower performance device, device may
  still process previous interaction. Add longer timeout to reduce
  flakes.

Bug: 293233390
Test: atest FrameworksNetTests
Test: atest VpnTest#testStartPlatformVpnFailedWithRecoverableError
      --rerun-until-failure 100
Change-Id: Ie42a2597a382800d6484a086b6d808490dfbdd32

* changes:
  Unregister BroadcastReceiver and OnSubscriptionsChangedListener.
  Disable KeepaliveStatsTracker before T.
  Disable KeepaliveStatsTracker instead of throwing.