Tracks
constructor(all: List<TrackInfo> = emptyList(), selectedVideo: TrackId? = null, selectedAudio: TrackId? = null, selectedSubtitle: TrackId? = null, selectedSecondarySubtitle: TrackId? = null, variants: List<StreamVariant> = emptyList(), selectedVariant: Int? = null, programs: List<MediaProgram> = emptyList(), selectedProgram: Int? = null, thumbnails: ThumbnailSet? = null)