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/services/java/com/android/server/InputManager.java b/services/java/com/android/server/InputManager.java
index 4c499cd..b5becb5 100644
--- a/services/java/com/android/server/InputManager.java
+++ b/services/java/com/android/server/InputManager.java
@@ -32,6 +32,7 @@
 import android.view.InputEvent;
 import android.view.KeyEvent;
 import android.view.Surface;
+import android.view.WindowManager;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -475,5 +476,13 @@
             }
             return result;
         }
+
+        @SuppressWarnings("unused")
+        public int getPointerLayer() {
+            return mWindowManagerService.mPolicy.windowTypeToLayerLw(
+                    WindowManager.LayoutParams.TYPE_DRAG)
+                    * WindowManagerService.TYPE_LAYER_MULTIPLIER
+                    + WindowManagerService.TYPE_LAYER_OFFSET;
+        }
     }
 }