Add support for secure views.

Added the MotionEvent.FLAG_WINDOW_IS_OBSCURED flag which is set by the
input manager whenever another visible window is partly or wholly obscured
the target of a touch event so that applications can filter touches
accordingly.

Added a "filterTouchesWhenObscured" attribute to View which can be used to
enable filtering of touches when the view's window is obscured.

Change-Id: I936d9c85013fd2d77fb296a600528d30a29027d2
diff --git a/services/java/com/android/server/InputWindow.java b/services/java/com/android/server/InputWindow.java
index 8da0cf1..dbc59ef 100644
--- a/services/java/com/android/server/InputWindow.java
+++ b/services/java/com/android/server/InputWindow.java
@@ -34,9 +34,17 @@
     // Dispatching timeout.
     public long dispatchingTimeoutNanos;
     
-    // Window frame position.
+    // Window frame area.
     public int frameLeft;
     public int frameTop;
+    public int frameRight;
+    public int frameBottom;
+    
+    // Window visible frame area.
+    public int visibleFrameLeft;
+    public int visibleFrameTop;
+    public int visibleFrameRight;
+    public int visibleFrameBottom;
     
     // Window touchable area.
     public int touchableAreaLeft;