VoiceInteraction - call PermissionEnforcer helper on methods annotated with @EnforcePermission

Migrates all existing java methods annotated with @EnforcePermission
such that they call the super.<methodName>_enforcePermission
method provided by PermissionEnforcer.

This required by the @EnforcePermission annotation, but is currently a no-op, and will be switched on with ag/20325484.

Bug: 234083358
Test: TH
Change-Id: Ib2a5f22cb4558a325cb7f11dd35c453afdb887d2