Initial public release of nearby library

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I85d490e448375aa4eb7b09680757c02fff1420b4

cpp/platform/impl/sample/CMakeLists.txt

@@ -0,0 +1,32 @@
+# Copyright 2020 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
+#
+#     https://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.
+
+add_library(platform_impl_sample STATIC)
+
+target_sources(platform_impl_sample
+  PRIVATE
+    sample_wifi_medium.cc
+  PUBLIC
+    sample_platform.h
+    sample_wifi_medium.h
+)
+
+target_link_libraries(platform_impl_sample
+  PUBLIC
+    absl::time
+    platform_api
+    platform_port_string
+    platform_types
+    platform_utils
+)