tree ba498659d918f6f12ff67b88f091057b279999a4
parent e0b730d4cf6165add3dc095a781aaeabe1157a07
author Lorenzo Colitti <lorenzo@google.com> 1611918844 +0900
committer Lorenzo Colitti <lorenzo@google.com> 1612871908 +0900

Add a registerSystemDefaultNetworkCallback method.

This method allows internal components to track the system
default network. This differs from registerDefaultNetworkCallback
because that method sends callbacks for the default network for
the UID that called it. This may not be the system default
network, for example, when a VPN is up and applies to the UID.

Bug: 173331190
Test: new unit tests in ConnectivityServiceTest
Test: new unit tests in ConnectivityManagerTest
Test: new CTS tests in ConnectivityServiceTest
Test: new CTS tests in HostsideVpnTests in other CL in this topic
Change-Id: Id02748a2183f71b71ff2a53a580466b9dcecaa93