title: Android facebook cannot change event's profile picture
body: <p>I use the old <code>facebook android api</code> for creating events. All work fine except when I am trying to post a <code>profile picture</code> for the event. The <code>facebook Graph api</code> says 
  <strong>You can add a profile picture to an event by issuing an HTTP POST request to /EVENT_ID/picture with the create_event permission for an admin of the event</strong> with the following parameter:<br></p>
  
  <pre><code>source  multipart/form-data 
  </code></pre>
  
  <p>Returns true if the request is successful.</p>
  
  <p>so I used this code:</p>
  
  <pre><code>Bundle picture_parameters = new Bundle();
  picture_parameters.putString("source", "https://foursquare.com/mapproxy/59.3280/18.0506/map.png");
  response = Utility.mFacebook.request(eventId + "/picture", picture_parameters, "POST");
  JSONObject myjson = Util.parseJson(response);
  Log.v("INFO", "!!!picture posted "+ response);
  </code></pre>
  
  <p>indeed returns true but no picture !!</p>