I've got it installed on my Nvidia Shield TV. What I did was installed APKPure and downloaded the XAPK through that app. Next I installed "Sideload Launcher" from the playstore since the app won't show up on the main Launcher. I plugged a mouse in to my Shield and it works flawlessly.
Perhaps by Emulating a PSP?
I don't know the FF series, nor PPSSPP, other than it works on Shield, to be honest, so I don't even know if this is what you're asking, I just feel that your question needs more possible answers.
Edit: added detail
Edit2: Okay, I guess that wasn't the question for that answer then.
Without controller support, it's not going to be useful.