Export the models directly under vision/modeling as tfm.vision.models.

The models package under the modeling folder serves as a placeholder for now, and eventually all the python modules under modeling now should be moved to modeling/models

PiperOrigin-RevId: 472827931

official/vision/modeling/__init__.py

@@ -18,3 +18,4 @@ from official.vision.modeling import backbones
 from official.vision.modeling import decoders
 from official.vision.modeling import heads
 from official.vision.modeling import layers
+from official.vision.modeling import models

official/vision/modeling/models/__init__.py

+# Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Models under Vision package."""
+
+from official.vision.modeling.classification_model import ClassificationModel
+from official.vision.modeling.maskrcnn_model import MaskRCNNModel
+from official.vision.modeling.retinanet_model import RetinaNetModel
+from official.vision.modeling.segmentation_model import SegmentationModel
+from official.vision.modeling.video_classification_model import VideoClassificationModel