Move talk/app/webrtc to webrtc/api

webrtc/api/java/src/org/webrtc/RtpSender.java

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 68 matching lines @@
 
   // This should increment the reference count of the track.
   // Will be released in dispose() or setTrack().
   private static native long nativeGetTrack(long nativeRtpSender);
 
   private static native String nativeId(long nativeRtpSender);
 
   private static native void free(long nativeRtpSender);
 }
 ;