While not specifically Android TV, the Android-x86 project provides an x86 version of Android that can run on traditional computers. They don't offer an ARM version; their software runs on x86 CPUs.
An ISO image for Android TV on ARM-based devices is not a straightforward concept, as Android TV is typically distributed as a firmware image or a system image (e.g., system.img ) rather than an ISO file. However, it is possible to create a bootable image for ARM-based devices using tools like: android tv arm iso
Radxa ROCK 5 Android TV 12 (unofficial port) While not specifically Android TV, the Android-x86 project