- resume position
- audio track
- subtitles track
- audio delay (specific setting for BT headsets)
- subtitles delay
- start paused
- Aspect ratio
- repeat
- shuffle
- play as audio
- Current position in playlist
- Current Renderer
- Equalizer
- Playback speed
- Currently, 'play as audio' is a media state on Android. It could be better to save it as a player state.
- Playlist could entirely be considered part of player state
- Playback speed: We can save a different rate for video, audio and podcast/audiobooks