Rename AppRTCDemo on Android and iOS to AppRTCMobile

webrtc/examples/objc/AppRTCMobile/RTCMediaConstraints+JSON.m

 /*
  *  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 14 matching lines @@
   }];
   // TODO(tkchin): figure out json formats for optional constraints.
   RTCMediaConstraints *constraints =
       [[RTCMediaConstraints alloc]
           initWithMandatoryConstraints:mandatoryContraints
                    optionalConstraints:nil];
   return constraints;
 }
 
 @end