This is an xposed module that enables the wallpaper service on the amazon firetv1 (not compatible with AFTV2 atm).
It is based on the findings of @schybiorz, so many thanks to him!
You will also need to sideload following apk files from his thread's download:
com.android.wallpaper.livepicker.apk (optional if you want some live wallpapers)
Link to the thread
I tested it with NovaLauncher and both images and live wallpapers work fine.
Also widgets work fine now!
(updated with systemui package also being mandatory)
Atm this is NOT compatible with FTV2 devices, as it would require different apk files.
I will update this if someone mods them accordingly.