Fix hard coded callback handling on error

[hossain-khan]

Core on ErrorFragment

        setButtonClickListener(view -> {
            // Listener must be attached on activity attach and callback should be set.
            getFragmentManager().beginTransaction().remove(ErrorFragment.this).commit();
            // FIXME This is a temp code, listener callback must be propagated to parent activity to take action
            getActivity().finish();
        });

Ideally it should call back to parent activity using listener and activity is the one should decide what to do.