Opens visibility of simple_fedavg.

PiperOrigin-RevId: 271676924

tensorflow_federated/python/research/simple_fedavg/BUILD

-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//tensorflow_federated/python/research"])
 
 licenses(["notice"])
 

tensorflow_federated/python/research/simple_fedavg/__init__.py

-# Lint as: python3
-# Copyright 2019, The TensorFlow Federated Authors.
-#
-# 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.