Added new VideoFrameBuffer methods Data[YUV]() etc.

Eliminate most uses of the old methods.

To continue on this path, once we agree the new methods make sense,
the next step is to rename cricket::VideoFrame::GetVideoFrameBuffer
--> video_frame_buffer, to match the name in webrtc::VideoFrame (if we
think that name is ok?). And then start updating all code to access
planes via the VideoFrameBuffer, and delete corresponding methods in
both cricket::VideoFrame and webrtc::VideoFrame.

BUG=webrtc:5682

Review URL: https://codereview.webrtc.org/1878623002

Cr-Original-Commit-Position: refs/heads/master@{#12407}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 06176e49e276d290209676c832f17d34329d9ecd
8 files changed