Add Xiaomi Motion Activated Night Light 2

[ov1d1u]

Hi,

I've spent several nights trying to reverse-engineer this device and I'd be disappointed if all my discoveries were kept to myself, so please also add this reference to your list: https://github.com/ov1d1u/mjyd2s_control

Maybe it will be useful for someone, as far as I know there's no other working implementation for this light.

Thanks!