chore: Update docstring for UpscaleImageAPIConfig

PiperOrigin-RevId: 756463193

Author: matthew29tang

src/main/java/com/google/genai/types/UpscaleImageAPIConfig.java

@@ -27,7 +27,7 @@
 import java.util.Optional;
 
 /**
- * API config for UpscaleImage with fields not exposed to users.
+ * Internal API config for UpscaleImage.
  *
  * <p>These fields require default values sent to the API which are not intended to be modifiable or
  * exposed to users in the SDK method.

src/main/java/com/google/genai/types/UpscaleImageAPIParameters.java

@@ -21,12 +21,14 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.google.api.core.InternalApi;
 import com.google.auto.value.AutoValue;
 import com.google.genai.JsonSerializable;
 import java.util.Optional;
 
 /** API parameters for UpscaleImage. */
 @AutoValue
+@InternalApi
 @JsonDeserialize(builder = UpscaleImageAPIParameters.Builder.class)
 public abstract class UpscaleImageAPIParameters extends JsonSerializable {
   /** The model to use. */