Make citation metadata uri optional

Author: rlazo

firebase-vertexai/firebase-vertexai.gradle.kts

@@ -61,7 +61,7 @@ dependencies {
   implementation("com.google.firebase:firebase-components:18.0.0")
   implementation("com.google.firebase:firebase-annotations:16.2.0")
   implementation("com.google.firebase:firebase-appcheck-interop:17.1.0")
-  implementation("com.google.ai.client.generativeai:common:0.9.0")
+  implementation("com.google.ai.client.generativeai:common:0.10.0")
   implementation(libs.androidx.annotation)
   implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
   implementation("androidx.core:core-ktx:1.12.0")

firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Candidate.kt

@@ -49,7 +49,7 @@ class CitationMetadata
 internal constructor(
   val startIndex: Int = 0,
   val endIndex: Int,
-  val uri: String,
+  val uri: String? = null,
   val license: String? = null
 )
 

firebase-vertexai/update_responses.sh

@@ -17,7 +17,7 @@
 # This script replaces mock response files for Vertex AI unit tests with a fresh
 # clone of the shared repository of Vertex AI test data.
 
-RESPONSES_VERSION='v2.*' # The major version of mock responses to use
+RESPONSES_VERSION='v3.*' # The major version of mock responses to use
 REPO_NAME="vertexai-sdk-test-data"
 REPO_LINK="https://github.com/FirebaseExtended/$REPO_NAME.git"