VideoCaptureAndroid: stop referencing ViERenderer

To facilitate building video_capture's java code without video_render's java
code this reorganizes the local-preview hack to be driven by MediaEngine.
This is the "first step" in the linked bug.

BUG=3175
R=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/11349004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5865 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed