Correct the state of the accessibility service

When an accessibility service package changes, it would be unbound.
This also causes it's removed from mBoundServices and adding into
mBindingServices currently. Hence, nothing happens since it's not
in mBoundServices in onPackageUpdateFinished(). Also, this service
wouldn't be bound since it is kept in mBindingServices. Remove the
accessibility service from mBindingServices after update, remove,
and force stop.

Bug: 116758044
Test: atest CtsAccessibilityServiceTestCases
Test: atest CtsAccessibilityTestCases
Test: update, remove, and force stop an enabled a11y service, and
      check if it could work again.
Change-Id: I61f8ac3ad92480b296f9970c9bb92af8f6767f1a