Currently, NET_CAPABILITY_NOT_VCN_MANAGED is implicited added for
NetworkRequest built by normal apps.
However, the tethering network agent doesn't have this capability,
which makes the agent being exposed to VcnManager and cannot be
seen by normal apps.
Add NET_CAPABILITY_NOT_VCN_MANAGED to tethering NetworkAgent. Include
NET_CAPABILITY_NOT_VCN_MANAGED in local network capabilities for
metrics and API utilities to ensure correct evaluation of local
network connectivity. Update unit tests to reflect the new capability.
Flag: EXEMPT bug fix
Test: atest ConnectivityCoverageTests:android.net.connectivity.com.android.server.CSSatisfiedByLocalNetworkMetricsTest \
ConnectivityCoverageTests:android.net.connectivity.com.android.metrics.SatisfiedByLocalNetworkMetricsTest \
--update-device
Test: manual generate request by CTS and statsd_testdrive -e 10247
Bug: 428098173
Change-Id: Ifa9ce0827abd22d887a0e8a2ab6f4d7391b2b8ed
fbf102a88b