am e71da1f7: Merge "MatroskaExtractor: use GetTrackByNumber instead of...
am e71da1f7: Merge "MatroskaExtractor: use GetTrackByNumber instead of GetTrackByIndex" into lmp-mr1-dev automerge: a7e65b19
* commit 'e71da1f7':
PlaylistFetcher: clear mStartup for .aac playlists after seek
MatroskaExtractor: use GetTrackByNumber instead of GetTrackByIndex