This includes two restriction changes of simulateDataStall:
- Allow simulation on a network that has an underlying test
network
- Allow simulation on networks created by the system server
This commit allows VCN and VPN to CTS test their abilities of
handling suspected data stall.
This commit is safe because #simulateDataStall is already protected
by two signature permissions MANAGE_TEST_NETWORKS and NETWORK_STACK,
and those permissions are granted to only preinstalled apps.
Bug: 263415068
Test: atest VcnManagerTest (new tests)
Change-Id: Ic0cdb66abb291fbf4a7545efe4114179e965d2b6
fe96dde298