Add ResponseModality support to GenerationConfig (#6921)

Per [b/414638874](https://b.corp.google.com/issues/414638874),

This adds support for `ResponseModality` in `GenerationConfig`. #6901
added this, but it seems it was missed during the migration to
`firebase-ai`.

Author: daymxn

firebase-ai/CHANGELOG.md

@@ -13,4 +13,5 @@
 * [fixed] Fixed an issue with `LiveContentResponse` audio data not being present when the model was
   interrupted or the turn completed. (#6870)
 * [fixed] Fixed an issue with `LiveSession` not converting exceptions to `FirebaseVertexAIException`. (#6870)
+* [feature] Add support for specifying response modalities in `GenerationConfig`. (#6921)
 * [feature] Added a helper field for getting all the `InlineDataPart` from a `GenerateContentResponse`. (#6922)

firebase-ai/api.txt

@@ -354,6 +354,7 @@ package com.google.firebase.ai.type {
     field public Integer? maxOutputTokens;
     field public Float? presencePenalty;
     field public String? responseMimeType;
+    field public java.util.List<com.google.firebase.ai.type.ResponseModality>? responseModalities;
     field public com.google.firebase.ai.type.Schema? responseSchema;
     field public java.util.List<java.lang.String>? stopSequences;
     field public Float? temperature;

firebase-ai/src/main/kotlin/com/google/firebase/ai/type/GenerationConfig.kt

@@ -75,6 +75,8 @@ import kotlinx.serialization.Serializable
  * Refer to the
  * [Control generated output](https://cloud.google.com/vertex-ai/generative-ai/docs/multimodal/control-generated-output)
  * guide for more details.
+ *
+ * @property responseModalities The format of data in which the model should respond with.
  */
 public class GenerationConfig
 private constructor(
@@ -88,6 +90,7 @@ private constructor(
   internal val stopSequences: List<String>?,
   internal val responseMimeType: String?,
   internal val responseSchema: Schema?,
+  internal val responseModalities: List<ResponseModality>?,
 ) {
 
   /**
@@ -115,6 +118,9 @@ private constructor(
    * @property responseMimeType See [GenerationConfig.responseMimeType].
    *
    * @property responseSchema See [GenerationConfig.responseSchema].
+   *
+   * @property responseModalities See [GenerationConfig.responseModalities].
+   *
    * @see [generationConfig]
    */
   public class Builder {
@@ -128,6 +134,7 @@ private constructor(
     @JvmField public var stopSequences: List<String>? = null
     @JvmField public var responseMimeType: String? = null
     @JvmField public var responseSchema: Schema? = null
+    @JvmField public var responseModalities: List<ResponseModality>? = null
 
     /** Create a new [GenerationConfig] with the attached arguments. */
     public fun build(): GenerationConfig =
@@ -142,6 +149,7 @@ private constructor(
         frequencyPenalty = frequencyPenalty,
         responseMimeType = responseMimeType,
         responseSchema = responseSchema,
+        responseModalities = responseModalities
       )
   }
 
@@ -156,7 +164,8 @@ private constructor(
       frequencyPenalty = frequencyPenalty,
       presencePenalty = presencePenalty,
       responseMimeType = responseMimeType,
-      responseSchema = responseSchema?.toInternal()
+      responseSchema = responseSchema?.toInternal(),
+      responseModalities = responseModalities?.map { it.toInternal() }
     )
 
   @Serializable
@@ -171,6 +180,7 @@ private constructor(
     @SerialName("presence_penalty") val presencePenalty: Float? = null,
     @SerialName("frequency_penalty") val frequencyPenalty: Float? = null,
     @SerialName("response_schema") val responseSchema: Schema.Internal? = null,
+    @SerialName("response_modalities") val responseModalities: List<String>? = null
   )
 
   public companion object {