Save the date! Android Dev Summit is coming to Mountain View, CA on November 7-8, 2018.

androidx.media.app

Classes

NotificationCompat Class containing media specfic styles that you can use with NotificationCompat.Builder.setStyle(NotificationCompat.Style)
NotificationCompat.DecoratedMediaCustomViewStyle Notification style for media custom views that are decorated by the system. 
NotificationCompat.MediaStyle Notification style for media playback notifications.