I can’t speak for other countries, the EU banned it a while ago, but up until very recently a lot of citrus drinks over here in the U.S. used a chemical called Brominated Vegetable Oil as a stabilizer/emulsifier I think? So at least in the U.S. there can be fats in some sodas. Maybe enough for the THC?
LineageOS Android TV looks like an interesting solution but having SELinux in permissive mode is a bit scary. Maybe someone with more in-depth Linux knowledge can chime in here but my understanding is that would mean that the Android kernel’s security system would basically be turned off. Permissive Mode logs security access violations within the OS but does nothing to prevent them so I would be wary of connecting it to the internet.