Verify that the callbacks onConnectivityReport() and
onNetworkConnectivityReported() are invoked by the System when expected.
ConnectivityDiagnosticsManager provides an API for registering callbacks
with the System. These callbacks allow the System to notify registered
and permissioned callbacks on Network validation, suspected data stalls,
and Network connectivity reported.
Bug: 148032944
Test: android.net.cts.ConnectivityDiagnosticsManagerTest
Change-Id: I748229d41c16adf1561e03aa597d5aac00f12912
214a8ea198