Fixes: 62233947
Test: revoke usb permissions, start enrolling, attach usb,
press ok, continue enroll. enroll should be able to continue
and complete
onPause was added in b/38102355, but onResume was not added. We should
set the listener in onResume()
Change-Id: I59e617b4789f028d01b86d38049671888c07a5ec