Disable subtitles from HLS stream

## 💬 Questions and Help

How do you disable subtitles from a HLS video stream you open from a m3u8-playlist that includes subtitles?
Excerpt from m3u8-playlist:
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=2770755,RESOLUTION=960x540,AUDIO="aac",SUBTITLES="subtitles"
0d20364d-74d7-4d1f-a15a-66777ce7d524_HLS/game.m3u8

In exoplayer you should be able to do this by doing somthing like:
trackSelector.setRendererDisabled(TRACK_TEXT, true);
trackSelector.clearSelectionOverrides();

For questions or help we recommend checking:

- The [Xamarin tag in Stack Overflow](https://stackoverflow.com/questions/tagged/xamarin)
- The [General slack channel in the Xamarin Slack](https://xamarinchat.herokuapp.com/)
- Ask your question in the [Xamarin Forums](https://forums.xamarin.com/)

No source file or test is named. Start by tracing how the Xamarin plugin handles HLS m3u8 subtitle tracks and how its ExoPlayer integration exposes track selection; compare that with the requested renderer-disable and selection-override behavior. Done means a clearly defined way to open the stream with subtitles disabled, covered by an appropriate test if the project supports one.

Written by the indexing model from the issue text.