AstroMediaMetadata
constructor(title: String? = null, artist: String? = null, albumTitle: String? = null, albumArtist: String? = null, displayTitle: String? = null, subtitle: String? = null, description: String? = null, artworkUri: Uri? = null, trackNumber: Int? = null, totalTrackCount: Int? = null, recordingYear: Int? = null, recordingMonth: Int? = null, recordingDay: Int? = null, releaseYear: Int? = null, releaseMonth: Int? = null, releaseDay: Int? = null, writer: String? = null, composer: String? = null, conductor: String? = null, discNumber: Int? = null, totalDiscCount: Int? = null, genre: String? = null, compilation: String? = null, station: String? = null, equalizerIdentifier: String? = null, extras: Map<String, Any>? = null)