@Override
    protected Parcelable onSaveInstanceState() {
        return new SavedState(super.onSaveInstanceState(), input.getInputString());
    }
Sets the padding to be used for the number pad buttons.

@param padding padding in pixels
android/third_party/time-duration-picker/src/main/java/mobi/upod/timedurationpicker/TimeDurationPicker.java