tree f52ffcff4198bacf5613633767e029a64d9554c5
parent 1bfabb36f5d6f09d87e9d52778b5a1cca9512722
author Insun Kang <insun@google.com> 1518056358 +0900
committer Insun Kang <insun@google.com> 1518167860 +0900

VideoView2: Applying missing experimental code for enabling subtitle

This will be repaced once it is integrated with MediaSesssion2 though.
It detects subtitle track and informs to MCV2 to via MediaSession event
so that MCV2 enable CC button.

TimedText related code is added for debugging purpose. It will be
removed later.

Test: VideoViewTest app
Change-Id: I3a8fef04b3cb4875f091f0b72d3a084bf5fa94ac