Whoops also need to move notification shade above lock screen.

And this requires making a new layer for the volume toast.

Change-Id: I4f272d56c87cf3b6bf886774b0fb02e610ab9164
diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index d1ad113..ff378a6 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -394,6 +394,13 @@
         public static final int TYPE_NAVIGATION_BAR = FIRST_SYSTEM_WINDOW+19;
 
         /**
+         * Window type: The volume level overlay/dialog shown when the user
+         * changes the system volume.
+         * @hide
+         */
+        public static final int TYPE_VOLUME_OVERLAY = FIRST_SYSTEM_WINDOW+20;
+
+        /**
          * End of types of system windows.
          */
         public static final int LAST_SYSTEM_WINDOW      = 2999;