...or at least make it considerably less common.
Sometimes the network is not validated. Instead of checking that the
diagnostics message says it is validated, check that it agrees with
the network capabilities.
Fixes: b/371856020
Test: ConnectivityDiagnosticsManagerTest and TH
Flag: EXEMPT test-only change
Change-Id: I83ff7572a300adf250f82869eff7c55664296f95