Add support for Livolo Illuminance and Sound Sensor

[PaulVanSchayck]

This add support for the Livolo Illuminance and Sound Sensor (VL-FCJZ-2WP).

A couple of remarks/questions:

• The illuminance value reports between 0 and 100%. I hope this current Expose definition works for that.
• The noise value can be 1, 2, 3 and 4. The device manual calls these "silent", "normal", "lively" and "noisy". In practice I've rarely seen 1 ("silent"), but do see 2, 3 and 4. Perhaps I should implement this as an Enum expose. Would that be the best solution?
• I still need to make the device entry PR for zigbee2mqtt.io

[Koenkk]

The noise values are fine, the bigger the more noise.

Thanks for the PR!

Could you also submit a picture for the docs? This can be done by:

1. Create a fork by clicking here
2. Go to the public/images/devices directory, Add file -> Upload files
3. Upload the files and press Commit changes
4. Press Contribute -> Open pull request -> update title/description -> Create pull request

Make sure that:

• The filename is MODEL.png (update model accordingly)
• The size is 512x512
• The background is transparent (use e.g. Adobe remove background)