help on determining what os is running on a streaming device



I've a TV set top box called Tvpad2. it's a streaming device primarily for watching east Asian TV programs. the services recently got shut down and now it's lost its primary function.

I played around with the box and had gained root access. it seems that it runs on busybox. but GUI interface resembles android. how do i determine whether it has android or Linux installed? I want to see whether it's possible to flash a custom OS...