MASTER_CLEAR action should not be public

Limit it to SystemApi, for passing intent tests

Bug: 36977779
Test: cts test
Change-Id: I716b94fc3cef43db1fafbfdad8dba0d850bec474
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index 0da4f8d..5ca4fa3 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -3424,8 +3424,10 @@
 
     /**
      * Deprecated - use ACTION_FACTORY_RESET instead.
+     * @hide
      */
     @Deprecated
+    @SystemApi
     public static final String ACTION_MASTER_CLEAR = "android.intent.action.MASTER_CLEAR";
 
     /**