Heavily improve the way Auxio handles shows formats in the song
properties view.
This is composed of the following:
- Using ExoPlayer to find a format-specific mime type before having to
fall back to other solutions
- Keeping around the format and extension mime types so that each is
picked in the best circumstances
- Using MediaFormat to also retrieve a format-specific mime type in the
case that ExoPlayer parsing is disabled
- Adding special names for the most common formats
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