Don't enable a11y service if scary dialog obscured

                    @Override

                    public boolean onTouch(View v, MotionEvent event) {

                        // Filter obscured touches by consuming them.

                        if ((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) {

                        if ((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_PARTIALLY_OBSCURED) != 0) {

                            if (event.getAction() == MotionEvent.ACTION_UP) {

                                Toast.makeText(v.getContext(), R.string.touch_filtered_warning,

                                        Toast.LENGTH_SHORT).show();