post
Posts the Notification to NotificationManager. This MUST be called upon first onRender invocation (or sooner) to ensure that the call to Service.startForeground is had, otherwise an ANR will result for Android API 26+.
NOTE: Notification.priority, Notification.audioAttributes, Notification.audioStreamType, and Notification.sound are always set for each invocation of post.
Throws
if called from non-main thread.