zhihuang af6293517f Support building WebRTC without audio and video for Android
This CL makes the WebRTC Java Wrapper more modular and allows the android
users to build WebRTC without audio and video(DataChannel only).

The BUILD file in sdk/android/ is modified to support modular WebRTC.

The peerconnection_jni.cc is split into peerconnection_jni.cc, video_jni.cc,
video_renderer_jni.cc and ownedfactoryandthreads.h/cc.

Add new modular build targets to JNI layer: audio_jni, video_jni,
null_audio_jni, null_video_jni. The users can link with different
targets to for different WebRTC functionalities.

This is split from CL: https://codereview.webrtc.org/2854123003/

TBR=magjed@webrtc.org
BUG=webrtc:7613

Review-Url: https://codereview.webrtc.org/2939203002
Cr-Commit-Position: refs/heads/master@{#18647}
2017-06-18 05:31:24 +00:00
..
2017-06-16 23:30:48 +00:00
2017-06-16 23:30:48 +00:00
2017-06-16 17:42:05 +00:00

Name: WebRTC
URL: http://www.webrtc.org
Version: 90
License: BSD
License File: LICENSE

Description:
WebRTC provides real time voice and video processing
functionality to enable the implementation of 
PeerConnection/MediaStream.

Third party code used in this project is described 
in the file LICENSE_THIRD_PARTY.