Add initial support for cursor-based pointing devices.

Some parts stubbed out but you can plug in a mouse and move
a green cursor around to interact with the UI.

Change-Id: I80d597a7f11d3bd92041890f74b3c77326975e6e
diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index e8792ff..c435c43 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -381,6 +381,11 @@
          */
         public static final int TYPE_STATUS_BAR_SUB_PANEL = FIRST_SYSTEM_WINDOW+17;
 
+        /**
+         * Window type: (mouse) pointer
+         * @hide
+         */
+        public static final int TYPE_POINTER = FIRST_SYSTEM_WINDOW+18;
 
         /**
          * End of types of system windows.