Cred mng app settings - close onRemove

Remove credential management app and close
settings screen when remove button is selected

Manual testing steps:
* Set app as creg mng app
* Remove cred mng app via Settings
* Verify screen is closed on remove

Bug: 177909523
Test: manual testing
Change-Id: Ie38a5340a4985fb4997f353556f49e9589e8da5f