king this method, the <a href="MediaPeriod.html" title="interface in com.google.android.exoplayer2.source"><code>MediaPeriod</code></a> can
 expect for <a href="MediaPeriod.html#selectTracks(com.google.android.exoplayer2.trackselection.ExoTrackSelection%5B%5D,boolean%5B%5D,com.google.android.exoplayer2.source.SampleStream%5B%5D,boolean%5B%5D,long)"><code>MediaPeriod.selectTracks(ExoTrackSelection[], boolean[], SampleStream[], boolean[],
 long)</code></a> to be called with the initial track selection.</div>
