AI upscaling works with Plex on the new (2019) SHIELD. It’s handled fully by the OS, as such every app supports it and doesn’t need any special support. There’s not really a native player on Android, but we do use the Google made ExoPlayer v2 project (heavily modified for extra awesomeness).
As well as AI upscaling, Plex on the SHIELD will soon (in v7.24) support Dolby Vision!
