PlaybackMetrics
constructor(sessionId: String, bandwidth: Long, indicatedBitrate: Long, playbackDuration: Duration, bufferingDuration: Duration, stallCount: Int, stallDuration: Duration, loadDuration: PlaybackMetrics.LoadDuration, totalLoadTime: Duration, totalBytesLoaded: Long, url: Uri?, videoFormat: Format?, audioFormat: Format?, surfaceSize: Size, totalDroppedFrames: Int)