If no accessibility services are enabled, we disable the accessibility event firing to save resources. When the last such services is disabled the system was not unbinding. As a result the user was seeing the touch exploration enable dialog when the service that requested it is disabled. Also there is one service the system is bound to that is not used. bug:8439191 Change-Id: I6f37f2573a815bfb29870298aa0abbb1fa105588