Add new model choices

Author: google-labs-jules[bot]

app/src/main/kotlin/com/google/ai/sample/GenerativeAiViewModelFactory.kt

@@ -14,7 +14,9 @@ enum class ModelOption(val displayName: String, val modelName: String) {
     GEMINI_FLASH_LITE("Gemini 2.0 Flash Lite", "gemini-2.0-flash-lite"),
     GEMINI_FLASH("Gemini 2.0 Flash", "gemini-2.0-flash"),
     GEMINI_FLASH_PREVIEW("Gemini 2.5 Flash Preview", "gemini-2.5-flash"),
-    GEMINI_PRO("Gemini 2.5 Pro (maybe don't work)", "gemini-2.5-pro")
+    GEMINI_PRO("Gemini 2.5 Pro (maybe don't work)", "gemini-2.5-pro"),
+    GEMINI_FLASH_LITE_PREVIEW("Gemini 2.5 Flash Lite Preview", "gemini-2.5-flash-lite-preview-06-17"),
+    GEMMA_3N_E4B_IT("Gemma 3N E4B IT", "gemma-3n-e4b-it")
 }
 
 val GenerativeViewModelFactory = object : ViewModelProvider.Factory {