Add hidden API for whether permission review mode is on.

BUG: 34240393
Change-Id: I68e55767a7da1d457a6cedd210aac9e339fb996c
diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index 37faa2e..c44cdb2 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -292,6 +292,12 @@
     }
 
     @Override
+    public boolean isPermissionReviewModeEnabled() {
+        return mContext.getResources().getBoolean(
+                com.android.internal.R.bool.config_permissionReviewRequired);
+    }
+
+    @Override
     public PermissionGroupInfo getPermissionGroupInfo(String name,
             int flags) throws NameNotFoundException {
         try {