Google's had this one listed under the known issues for a little while (https://support.google.com/androidauto/#6200174), but I had to try for myself anyway, now that the Verizon G3 has Lollipop.
And sure enough, it's a nonstarter. I'd forgotten that LG has those different USB options, and that's obviously jacking up Android Auto. :-/
And sure enough, it's a nonstarter. I'd forgotten that LG has those different USB options, and that's obviously jacking up Android Auto. :-/