Fix wrong request_count in connectivityStateSample and add tests

This CL updates CSTest to use mocked appOpsManager to bypass
checkPackage enforcement so that test can file network request as
SYSTEM_UID

Bug: 314627716
Test: atest ConnectivitySampleMetricsTest
Change-Id: I0a5f3b1bf2c343644e6f5e2a4ec1b0460e2645c4
3 files changed