https://github.com/markop159/KODI-Popcorn-Time
or you can just download and install the zip:
https://github.com/markop159/Markop159-repository/tree/master/Releases/plugin.video.kodipopcorntime
Actually, PopcornTime has a dedicated UI for Android TV, and it's pretty good. As for alternatives, I really haven't used any.
https://reddit.com/r/TTVreborn/comments/9xxng0/streaming_apps_official_links_how_to_use_trakt/
https://github.com/markop159/KODI-Popcorn-Time
or you can just download and install the zip:
https://github.com/markop159/Markop159-repository/tree/master/Releases/plugin.video.kodipopcorntime