Can an android live wallpaper incorporate ads?

I can't seem to get ads working on my live wallpaper for android. when i take the wallpaper feature out the ads load just fine. The project is part c# in unity and part java in android studio. ive compiled the project in both ide's and i get the same results. either the ads work with no live wallpaper or the wallpaper works with no ads. i read somewhere that google took out the ability to be able to show ads on a live wallpaper and only in the settings. is this true? can you incorporate ads into a live wallpaper for android phones?