Trying to unregister a semi connected accessibility service.

    When an accessibility service connects we get a callback in
    which we either add the service, if this service is in the list
    of connecting services (we still want the service to connect),
    or we unbind and clear the state, if the service is no longer in
    the list of connecting services (we do not want this service to
    connect because something change between the bind request and
    the connection callback).

    The problem is that when the service connects and it is not in
    the list of connecting services on service connected we called
    the clean up code before the connection was complete. However,
    the clean up code expects fully configured services. Now we
    fully connect the service and in case there is a problem -
    disconnect it.

    bug:8232627

Change-Id: I939e544e31ffc1406035265a012c180f2ca95d7c