Fix bug #16533532 Settings app crashes on device orientation change

...when "change language" warning dialog is on screen

- try harder at getting the parent fragment. First try by calling
getParentFragment() and if this is getting a null reference, try
again by using the fragment Id saved during onSaveInstanceState()

Change-Id: I3dbc6a229224c8770ff2c7e432e76b8796c4b099