Certain carriers have requested the ability to disable the warning,
limit, and rapid data usage notifications shown by the OS, so give
them that ability on a per-subId basis. (The notifications are still
enabled by default.)
Unhide NOT_CONGESTED to match setSubscriptionOverrideCongested().
Fix bug in getPrimarySubscriptionPlanLocked() to find the first
currently active plan; the first non-recurring plan may be no longer
active. Fix bug in SubscriptionPlan which allowed invalid negative
or zero-length Period objects.
Bug: 77851691, 77506882, 77662747
Test: atest com.android.server.NetworkPolicyManagerServiceTest
Test: atest android.telephony.cts.SubscriptionManagerTest
Exempt-From-Owner-Approval: SDK deadline, responding to API feedback
Change-Id: Ib6e6dbadd5022937c3f0661ab4b66aa617f0b5af