Update ACTION_SHOW_ADMIN_SUPPORT_DETAILS action to be hidden.

Bug: 27225657
Change-Id: I85ad8bf88845e9164011b303ec9ca90d993fc20e
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 7830142..828d0b2 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -1203,6 +1203,8 @@
      * Input: Nothing.
      * <p>
      * Output: Nothing.
+     *
+     * @hide
      */
     @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
     public static final String ACTION_SHOW_ADMIN_SUPPORT_DETAILS