Honestly, I've not caught myself up on the details of OpenID Connect, so I don't know that I can answer this question definitively. I do know that OpenID Connection leans on OAuth2, but I can't say for sure whether or not OpenID Connect does anything special with OAuth2 that would prevent using Spring Social as-is to authenticate.
I'm hoping someone else in the community can pitch in here and give some insight. Since the question has been answered, I'm adding a TODO for myself to get to know OpenID Connect better...and then maybe I can answer your question. But if anyone else knows I'd appreciate hearing the answer myself.
Spring Social Project Lead