feat: Add gemini-3.1-flash-lite to model options

PiperOrigin-RevId: 913962872

Author: Annhiluc

google/genai/_interactions/types/model.py

@@ -37,6 +37,7 @@
         "gemini-3-pro-preview",
         "gemini-3.1-pro-preview",
         "gemini-3.1-flash-image-preview",
+        "gemini-3.1-flash-lite",
         "gemini-3.1-flash-lite-preview",
         "gemini-3.1-flash-tts-preview",
         "lyria-3-clip-preview",

google/genai/_interactions/types/model_param.py

@@ -39,6 +39,7 @@
         "gemini-3-pro-preview",
         "gemini-3.1-pro-preview",
         "gemini-3.1-flash-image-preview",
+        "gemini-3.1-flash-lite",
         "gemini-3.1-flash-lite-preview",
         "gemini-3.1-flash-tts-preview",
         "lyria-3-clip-preview",