Separate out stubs from non-updatable part of the system server. The
ultimate goal is to create system server stubs by merging the
non-updatable stubs and the per-module stubs, instead of generating them
from the combined sources.

Bug: 177640454
Test: m checkapi

Change-Id: Iecb9d51472ae238bbeabe65e1cd782b7c8a4ce59
Merged-In: Iecb9d51472ae238bbeabe65e1cd782b7c8a4ce59

* changes:
  Allow setting underlying networks when legacy lockdown enabled.
  Allow passing the underlying network to startLegacyVpn.

Currently, if a legacy lockdown VPN is up, no VPN can set
underlying networks. This does not make much sense.

When legacy lockdown VPN is enabled, no other VPN is allowed to
call prepare() or establish(), so no other VPN can connect, and
if no VPN can connect, then no VPN can set underlying networks.
Therefore, disabling the ability to set underlying networks only
affects the legacy lockdown VPN itself.

This change is necessary because in a future CL, the legacy
lockdown VPN will start to inform ConnectivityService of its
underlying network.

Bug: 173331190
Test: tests in subsequent CLs in stack
Change-Id: Ifa2aa3351c2c8324571f96fda151864ed987ed5a

This will be used by a future change that makes the legacy
lockdown VPN pass the underlying network.

Bug: 173331190
Test: tests in subsequent CLs in stack
Change-Id: I09366a7f872ef3d4538962a75b0114a2ecb536e6

This reverts commit 20384eea.

Reason for revert: Broke HostsideVpnTests

Fix: 177943140
Change-Id: I23924181e46fd1f16a60ec420426d1ed39705050

Test: Presubmit
Change-Id: I42d508836b409d5e1263e330221ea41d77fb9e21

Updating ConnectivityService foundational support for multiple default
networks by extending mDefaultRequest and mDefaultNetworkNai from single
instances to a HashMap to support more than a single default network.

Bug: 176027457
Bug: 172347841
Test: atest FrameworksNetTests
atest NetworkStackTests
atest FrameworksNetIntegrationTests
atest NetworkStackIntegrationTests
atest CtsNetTestCasesLatestSdk

Change-Id: I2f5fa96c2d21ab883499e82afa74e73f3ca606cd

Currently we are seeing TEMPORARILY_NOT_METERED occurs on non-5G
devices. This fix adds more checks to prevent incorrect
TEMPORARILY_NOT_METERED being set. Before we root cause the issue,
we only allow this bit when all of the following conditions met.

1. Devices should support 5G.
2. Carriers should support 5G unmetered data.
3. Device should camp on 5G network.

This temporary fix should be removed after we root cause the issue.

Bug: 176119724
Test: Manual
Change-Id: I2b987d24851cdb16d8457b0ec5c546ace5485ed0
Merged-In: I2b987d24851cdb16d8457b0ec5c546ace5485ed0

Bug: 175084231
Bug: 178125790
Test: atest android.net.wifi.cts.WifiManagerTest#testRestartWifiSubsystem
Test: atest android.permission2.cts.PermissionPolicyTest#platformPermissionPolicyIsUnaltered
Change-Id: Icb5db0a347c4714398fd4cbaef86bad2fd896358

* changes:
  Implement Network policy in VcnManagementService.
  Unit test UnderlyingNetworkTracker.
  Register NetworkCallbacks in UnderlyingNetworkTracker.

Test: not needed as this is a meta file change

Change-Id: I32f5205c4c1b771aae963a20e9a52fa7691ce271

This patch also removes the functionality of returning
original subscriberId in eng build since it is not really useful.

Test: atest NetworkIdentityUtilsTest
Bug: 174123988
Change-Id: I721457e571aa9403a2200b3e4261b4895e4f7a3e

Test: atest android.net.UnderlyingNetworkInfoTest
Bug: 174123988
Change-Id: Id602fbe744669f472d27fb466d00dcc601bd8f17

* changes:
  Add the underlying networks to NetworkAgentInfo#toString.
  Improve testing for network blocking.

This is useful in debugging VPN networks.

Bug: 173331190
Test: manual
Change-Id: I4f38a53980191a1813c2ef313fedc51af98f18f6

This simplifies the uidNetworkingBlocked method and makes it more
realistic by supporting more combinations of rules than just the
four used by this test.

Also support RULE_ALLOW_METERED, and add test coverage for it.

Test: test-only change
Change-Id: Id4f6c7f41429f3ae7841d3214b3e5e95ec591f85

Test: None

Change-Id: If6556c47fed63a01013ffa1a2a0ccc2afd774989

Change-Id: Ie35db2cfef32543e573bf701d2d523f5f1502161
Tested: N/A