[REVIEW]Add remote storage support

python/cugraph/cugraph/gnn/__init__.py

@@ -12,4 +12,5 @@
 # limitations under the License.
 
 from .dgl_extensions.cugraph_store import CuGraphStore
+from .dgl_extensions.cugraph_service_store import CuGraphRemoteStore
 from .dgl_extensions.feature_storage import CuFeatureStorage

python/cugraph/cugraph/gnn/dgl_extensions/__init__.py

@@ -0,0 +1,12 @@
+# Copyright (c) 2022, NVIDIA CORPORATION.
+# 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.