General cleanup on AppRTC Android Demo codebase

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

 /*
  *  Copyright 2015 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 24 matching lines @@
   private TextView captureFormatText;
   private SeekBar captureFormatSlider;
   private OnCallEvents callEvents;
   private ScalingType scalingType;
   private boolean videoCallEnabled = true;
 
   /**
    * Call control interface for container activity.
    */
   public interface OnCallEvents {
-    public void onCallHangUp();
-    public void onCameraSwitch();
-    public void onVideoScalingSwitch(ScalingType scalingType);
-    public void onCaptureFormatChange(int width, int height, int framerate);
-    public boolean onToggleMic();
+    void onCallHangUp();
+    void onCameraSwitch();
+    void onVideoScalingSwitch(ScalingType scalingType);
+    void onCaptureFormatChange(int width, int height, int framerate);
+    boolean onToggleMic();
   }
 
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
       Bundle savedInstanceState) {
     controlView =
         inflater.inflate(R.layout.fragment_call, container, false);
 
     // Create UI controls.
     contactView =
@@ skipping 79 matching lines @@
     }
   }
 
   @Override
   public void onAttach(Activity activity) {
     super.onAttach(activity);
     callEvents = (OnCallEvents) activity;
   }
 
 }