I used to install Kodi with TVHeadend plugin. But on a new Google TV I had issues with Kodi not starting under child profile, because of some bug with permission issues to the storage.

TiviMate seams to be working fine, you just need to add Playlist URL and EPG URL.

http://tvheadend:9981/playlist/channels.m3u
http://tvheadend:9981/xmltv/channels