Catch ForegroundServiceStartNotAllowedException in stopSelfSafely.

Catch ForegroundServiceStartNotAllowedException when stopSelfSafely()
attempts to set a shutdown notification. On Android 12+, starting a
foreground service may not be allowed from the background, throwing this
exception. Catching it ensures the service can proceed to stop safely
without crashing the application.

Issue: androidx/media#3310
#cherrypick
PiperOrigin-RevId: 949009537
(cherry picked from commit abfcccadeaee42e52c641ea2a5461fea3a96caf6)