Modify native ALooper to take an explicit ident.

The ALooper API now uses an explicit "identifier" for the integer
that is returned rather than implicitly using the fd.  This allows
the APIs that had the fd to be a little more sane.

Change-Id: I8507f535ad484c0bdc4a1bd016d87bb09acd7ff0
diff --git a/native/include/android/input.h b/native/include/android/input.h
index 418f609..5b62da4 100644
--- a/native/include/android/input.h
+++ b/native/include/android/input.h
@@ -623,10 +623,10 @@
 
 /*
  * Add this input queue to a looper for processing.  See
- * ALooper_addFd() for information on the callback and data params.
+ * ALooper_addFd() for information on the ident, callback, and data params.
  */
 void AInputQueue_attachLooper(AInputQueue* queue, ALooper* looper,
-        ALooper_callbackFunc* callback, void* data);
+        int ident, ALooper_callbackFunc* callback, void* data);
 
 /*
  * Remove the input queue from the looper it is currently attached to.