General cleanup on AppRTC Android Demo codebase

webrtc/examples/androidapp/src/org/appspot/apprtc/RoomParametersFetcher.java

 /*
  *  Copyright 2014 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 27 matching lines @@
   private static final String TAG = "RoomRTCClient";
   private static final int TURN_HTTP_TIMEOUT_MS = 5000;
   private final RoomParametersFetcherEvents events;
   private final String roomUrl;
   private final String roomMessage;
   private AsyncHttpURLConnection httpConnection;
 
   /**
    * Room parameters fetcher callbacks.
    */
-  public static interface RoomParametersFetcherEvents {
+  public interface RoomParametersFetcherEvents {
     /**
      * Callback fired once the room's signaling parameters
      * SignalingParameters are extracted.
      */
-    public void onSignalingParametersReady(final SignalingParameters params);
+    void onSignalingParametersReady(final SignalingParameters params);
 
     /**
      * Callback for room parameters extraction error.
      */
-    public void onSignalingParametersError(final String description);
+    void onSignalingParametersError(final String description);
   }
 
   public RoomParametersFetcher(String roomUrl, String roomMessage,
       final RoomParametersFetcherEvents events) {
     this.roomUrl = roomUrl;
     this.roomMessage = roomMessage;
     this.events = events;
   }
 
   public void makeRequest() {
@@ skipping 154 matching lines @@
     return ret;
   }
 
   // Return the contents of an InputStream as a String.
   private static String drainStream(InputStream in) {
     Scanner s = new Scanner(in).useDelimiter("\\A");
     return s.hasNext() ? s.next() : "";
   }
 
 }