Communication protocol for Dive: Socket connection

- The socket connection header and its implementation were added.
- An initial cmake setup was added for transfer_client and
  transfer_server libraries.

Author: elviscapiaq

CMakeLists.txt

@@ -96,6 +96,7 @@ if (NOT ANDROID)
     add_subdirectory(third_party/googletest)
 endif()
 
+add_subdirectory(network)
 add_subdirectory(capture_service)
 add_subdirectory(layer)
 add_subdirectory(runtime_layer)

network/CMakeLists.txt

@@ -0,0 +1,43 @@
+#
+# Copyright 2025 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.
+#
+
+cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
+
+project(network)
+
+# Define source files for the client library.
+set(NETWORK_CLIENT_SRCS socket_connection.cc)
+
+# Define header files for the client library.
+set(NETWORK_CLIENT_HDRS socket_connection.h)
+
+# Create the client library.
+add_library(network_client SHARED ${NETWORK_CLIENT_SRCS} ${NETWORK_CLIENT_HDRS})
+
+# Set include directories for the client library.
+target_include_directories(network_client PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+# Define source files for the server library.
+set(NETWORK_SERVER_SRCS socket_connection.cc)
+
+# Define header files for the server library.
+set(NETWORK_SERVER_HDRS socket_connection.h)
+
+# Create the server library.
+add_library(network_server SHARED ${NETWORK_SERVER_SRCS} ${NETWORK_SERVER_HDRS})
+
+# Set include directories for the server library.
+target_include_directories(network_server PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})