They come with apps, just not for Android TV.

https://github.com/BradyBrenot/huestacean

This works great on my shield. Few bugs like not remembering the last settings used but the dev is working on it. Just download the most recent APK and sideload it.

Here is a direct link to the APK

download here

How about controlling them with Google assistant

Check out https://www.dreamscreentv.com . I had the original kit and have upgraded to the DIY version. Well worth the money and can plug any device in via HDMI