Android AppRTCMobile: Transition local render to new VideoSink interface BUG=None Review-Url: https://codereview.webrtc.org/3016443002 Cr-Original-Commit-Position: refs/heads/master@{#19820} Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc Cr-Mirrored-Commit: 4e15e67da8072e8ce7b70c32df3c4be286363ab4