Fix end-call FAB position when dial pad is shown on device rotate.

Move the "onDialpadVisibilityChange()" listener call so that it takes
place regardless if the dialpad is animated on show-hide.  That
listener triggers "updateFabPosition()" in callCardFragment, which
repositions the fab.

Bug: 27170964
Change-Id: I56588695c633205f4ebaac6d9685f543b9e09293