### Description - Add support for specifying the API version (e.g., `v1` or `v1beta`) in requests to the Vertex AI in Firebase API (`firebasevertexai.googleapis.com`). - Set the default value to `v1`. ### API Proposal API proposal approved in [go/firebase-vertex-set-api-version](https://goto.corp.google.com/firebase-vertex-set-api-version) (Google-internal only). ### Firebase Product(s) Vertex AI