not sure what you mean by support from google. if you mean security patches and updates, then yes google has already moved on. i don't think there was an official announcement, and i do not see a reason going forward why google would make these announcements.
also keep in mind, most updates are not necessarily all google. most updates are device and carrier coordinated as well. i usually like to think that on average most device will get upto 2 major updates with a few security patches sprinkled here and there.