10d285ac06
A recent change on the multi-track API surfaced an issue that it's hard to identify selected tracks from the list of tracks obtained from TvView.getTracks() method, especially when two or more tracks convey the same track information (e.g. two English stereo audio tracks with the same sample rate). This change introduced a new public method getId() in TvTrackInfo that returns an ID with which one can identify the tracks uniquely. It also led to minor signature changes across the multi-track API to make it more developer-friendly in both application and TV input service developers' perspectives. Change-Id: I226f75e697b0ce52b44db7471660f6d9f646f6f9