feat: Add safety filter levels, watermark support and person generation support for Imagen 2

Changelog:
Changed the following parameters internally:

  - `editConfig` to `editConfigV6`
  - `segmentationClasses` to `classes`
  - `safetyFilterLevel` to `safetySetting`

PiperOrigin-RevId: 619620158

Author: vertex-sdk-bot

tests/unit/aiplatform/test_vision_models.py

@@ -499,7 +499,7 @@ def test_generate_images_gcs(self):
                 actual_parameters["outputOptions"]["compressionQuality"]
                 == compression_quality
             )
-            assert actual_parameters["safetyFilterLevel"] == safety_filter_level
+            assert actual_parameters["safetySetting"] == safety_filter_level
             assert actual_parameters["personGeneration"] == person_generation
 
         assert len(image_response2.images) == number_of_images
@@ -639,7 +639,7 @@ def test_generate_images_requests_safety_filter_level(self):
                 )
                 predict_kwargs = mock_predict.call_args[1]
                 actual_parameters = predict_kwargs["parameters"]
-                assert actual_parameters["safetyFilterLevel"] == level
+                assert actual_parameters["safetySetting"] == level
 
     def test_generate_images_requests_person_generation(self):
         """Tests that the model class generates person images."""

vertexai/vision_models/_vision_models.py

@@ -502,8 +502,8 @@ class ID
             shared_generation_parameters["mask_mode"] = mask_mode
 
         if segmentation_classes is not None:
-            parameters["editConfig"]["segmentationClasses"] = segmentation_classes
-            shared_generation_parameters["segmentation_classes"] = segmentation_classes
+            parameters["editConfig"]["classes"] = segmentation_classes
+            shared_generation_parameters["classes"] = segmentation_classes
 
         if mask_dilation is not None:
             parameters["editConfig"]["maskDilation"] = mask_dilation
@@ -527,7 +527,7 @@ class ID
             shared_generation_parameters["add_watermark"] = add_watermark
 
         if safety_filter_level is not None:
-            parameters["safetyFilterLevel"] = safety_filter_level
+            parameters["safetySetting"] = safety_filter_level
             shared_generation_parameters["safety_filter_level"] = safety_filter_level
 
         if person_generation is not None: