title: Facebook Request.callback() not firing when request is made from Service
body: <p>I have a Service that uploads photos to a Facebook album, and it works fine. The problem is that the callback is never called (and the service is still alive...)</p>
  
  <pre><code>Request uploadPhoto = new Request(Session.getActiveSession(), albumId + "/photos", 
  params, HttpMethod.POST,new Request.Callback() {
          public void onCompleted(Response response) {
            //After upload to facebook succeeded, upload the data to the server.
            Log.d(" in calback!!! ", "");
  });
  uploadPhoto.executeAsync();
  </code></pre>