1. The accessibility layer has a back door for a UI test automation code running
from the shell to attach. The unregister code does an incorrect identity check
and as a result the register UI test automation service is not disconnected
until its process is killed. The fix is super safe and simple.
bug:7409261
Change-Id: I4b1da18be6c5619dadd4a58fca6724529bc59dea