Add support for the PointerLocation overlay.

This change involves adding a new method to IWindowManager,
monitorInput() that returns an InputChannel to receive a copy of all
input that is dispatched to applications.  The caller must have
the READ_INPUT_STATE permission to make this request (similar to
other window manager methods such as getKeycodeState).

Change-Id: Icd14d810174a5b2928671ef16de73af88302aea0
diff --git a/core/java/android/os/Looper.java b/core/java/android/os/Looper.java
index 69b3540..a9d7342 100644
--- a/core/java/android/os/Looper.java
+++ b/core/java/android/os/Looper.java
@@ -180,6 +180,11 @@
         return mThread;
     }
     
+    /** @hide */
+    public MessageQueue getQueue() {
+        return mQueue;
+    }
+    
     public void dump(Printer pw, String prefix) {
         pw.println(prefix + this);
         pw.println(prefix + "mRun=" + mRun);