And MP4 code clean ups due to mp4 box changes. Change-Id: I712b2dceb5038bfefa14097fe2fb2ab1fb913cb5
Create new classes: StreamInfo, AudioStreamInfo, VideoStreamInfo, MediaParser, MediaSample, MP4MediaParser. Change-Id: I19c2fc73964d9f8fc90acaddd1783f4e6ff87d07