chore: add _VertexAiPipelineBasedService base class

PiperOrigin-RevId: 487064823

Author: sararob

google/cloud/aiplatform/_pipeline_based_service/__init__.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2022 Google LLC
+#
+# 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.
+#
+
+from google.cloud.aiplatform._pipeline_based_service.pipeline_based_service import (
+    _VertexAiPipelineBasedService,
+)
+
+__all__ = ("_VertexAiPipelineBasedService",)