- FaceLock area now specified in layout files instead of trying to
grab an existing view, which was only practical if pattern was
backup method
- Now fills area it is supposed to and works with pin as well as
pattern backup
- Backup method is no longer exposed behind FaceLock just before it
starts or just after it tells the lockscreen to unlock
- Added synchronized blocks so FaceLock cannot be told to stopUI by
two different threads at the same time
Change-Id: I3bfad6b44dbe0e3c2ea3c87d2978451c22a7484c
4d7cee1e4b