More maybe fix issue #22765972: Binder transactions running out...

...of address space causing package manager to fail

Make sure to flush binder commands when done with an async task.

Change-Id: I9f171add7051587ab854226b97a12c7e1844ad5d
diff --git a/core/java/android/os/AsyncTask.java b/core/java/android/os/AsyncTask.java
index 243ddf7..521df28 100644
--- a/core/java/android/os/AsyncTask.java
+++ b/core/java/android/os/AsyncTask.java
@@ -292,7 +292,9 @@
 
                 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
                 //noinspection unchecked
-                return postResult(doInBackground(mParams));
+                Result result = doInBackground(mParams);
+                Binder.flushPendingCommands();
+                return postResult(result);
             }
         };