Block creation of mutable implicit PendingIntent

After auditing and migrating all usages within the platform
(go/mutable-pis), convert Slog.wtfStack() to IllegalArgumentException().

ag/20580416 is the initial CL that introduced this feature.

Bug: 236704164
Bug: 229362273
Bug: 262253127
Test: atest PendingIntentTest
Change-Id: Ie33d850548520c9d887a562ab8f46b5793c65033