Merge "Notify ClockChangedListeners on main thread"

        mPreviewClocks.reloadCurrentClock();

        mListeners.forEach((listener, clocks) -> {

            clocks.reloadCurrentClock();

            ClockPlugin clock = clocks.getCurrentClock();

            if (clock instanceof DefaultClockController) {

                listener.onClockChanged(null);

            final ClockPlugin clock = clocks.getCurrentClock();

            if (Looper.myLooper() == Looper.getMainLooper()) {

                listener.onClockChanged(clock instanceof DefaultClockController ? null : clock);

            } else {

                listener.onClockChanged(clock);

                mMainHandler.post(() -> listener.onClockChanged(

                        clock instanceof DefaultClockController ? null : clock));

            }

        });

    }