This CL updates ConnectivityDiagnostics to report
NETWORK_VALIDATION_RESULT_SKIPPED when the platform does not validate
the reported Network. This CL also updates the behavior for
ConnectivityManager#reportNetworkConnectivity, such that it will always
generate a ConnectivityReport on the reported network. If the reported
connectivity does not match the known connectivity of this network, the
network is revalidated and a report is generated. Otherwise,
revalidation is not performed and the cached ConnectivityReport is sent
instead.
This CL also updates ConnDiags behavior for calls to
ConnectivityManager#reportNetworkConnectivity. Specifically, ConnDiags
callbacks are only notified for these calls if:
a) the call causes the Network to be re-validated, or
b) the callback registrant was the caller of
#reportNetworkConnectivity().
For b), the caller is always guaranteed to receive a ConnectivityReport
(a fresh report if the Network is re-validated, else the cached report).
Bug: 162407730
Test: atest FrameworksNetTests ConnectivityDiagnosticsManagerTest
Change-Id: I78b78919d5b0f09348dfdd5fdb37418b8c7f861f
f1120be78b