[Firebase AI] Update model versions and merge `main` in #1812#1816

andrewheard wants to merge 4 commits intopeterfriese/firebase-ai-quickstart-refresh-mainfirebase/quickstart-ios:peterfriese/firebase-ai-quickstart-refresh-mainfrom

ah/firebase-ai-quickstart-refresh-mainfirebase/quickstart-ios:ah/firebase-ai-quickstart-refresh-mainCopy head branch name to clipboard