Validate NOT_CONGESTED and invalid plans.

Verify that NOT_CONGESTED flows through to capabilities, and verify
that overrides can only be performed when valid plans are defined.

Bug: 77851691, 77506882, 77662747
Test: atest com.android.server.NetworkPolicyManagerServiceTest
Test: atest android.telephony.cts.SubscriptionManagerTest
Change-Id: I40006a7d82017b2189e36be076d50a139fe096cd
1 file changed