Use the CAST_SETTINGS activity for Cast Screen / More Settings.

/** Quick settings tile: Cast **/

public class CastTile extends QSTile<QSTile.BooleanState> {

    private static final Intent WIFI_DISPLAY_SETTINGS =

            new Intent(Settings.ACTION_WIFI_DISPLAY_SETTINGS);

    private static final Intent CAST_SETTINGS =

            new Intent(Settings.ACTION_CAST_SETTINGS);

    private final CastController mController;

    private final CastDetailAdapter mDetailAdapter;

        @Override

        public Intent getSettingsIntent() {

            return WIFI_DISPLAY_SETTINGS;

            return CAST_SETTINGS;

        }

        @Override