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

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: rlazo

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

@@ -181,7 +181,7 @@ internal object LiveServerMessageSerializer :
       "toolCall" in jsonObject -> LiveServerToolCall.InternalWrapper.serializer()
       "toolCallCancellation" in jsonObject ->
         LiveServerToolCallCancellation.InternalWrapper.serializer()
-      else -> throw SerializationException("Unknown LiveServerMessage response type: $jsonObject.")
+      else -> throw SerializationException("Unknown LiveServerMessage response type. Keys found: ${jsonObject.keys}")
     }
   }
 }