FaceService - 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: Id2217b23651abc7d9dceb7c052aa3568cb789925

services/core/java/com/android/server/biometrics/sensors/face/FaceService.java

@@ -200,6 +200,8 @@ public class FaceService extends SystemService {
         @android.annotation.EnforcePermission(android.Manifest.permission.USE_BIOMETRIC_INTERNAL)
         @Override
         public void scheduleWatchdog() {
+            super.scheduleWatchdog_enforcePermission();
+
             final Pair<Integer, ServiceProvider> provider = mRegistry.getSingleProvider();
             if (provider == null) {
                 Slog.w(TAG, "Null provider for scheduling watchdog");