Add disableSelf() and more failure codes

disableSelf() allows the implementer of the service to notify the system
about the intent to disable self, e.g. in case it does not have sufficient
permissions to perform the task.

New failure codes are introduced to communicate the absense of the
camera permission and a cancellation event.

Bug: 128921381, 111939367
Test: manually
Change-Id: Id9a2a8e8d51d422e966a5858c85f8a73ca37ded7