Releasing the former Stadia file transfer tools

The tools allow efficient and fast synchronization of large directory
trees from a Windows workstation to a Linux target machine.

cdc_rsync* support efficient copy of files by using content-defined
chunking (CDC) to identify chunks within files that can be reused.

asset_stream_manager + cdc_fuse_fs support efficient streaming of a
local directory to a remote virtual file system based on FUSE. It also
employs CDC to identify and reuse unchanged data chunks.

tests_cdc_rsync/BUILD

@@ -0,0 +1,44 @@
+package(default_visibility = ["//visibility:public"])
+
+# Using a cc_binary rule here to avoid that this test is included when running
+# test from bazel directly. This target is just a convenience target for all the
+# unit tests in the scope run from Visual Studio, thus running the following
+# command would execute all tests twice:
+#
+# bazel test --build_tests_only //...
+#
+# To run this target with Bazel directly, just use "bazel run" instead of
+# "bazel test".
+cc_binary(
+    name = "tests_cdc_rsync",
+    testonly = True,
+    srcs = [
+        "//cdc_rsync:all_test_sources",
+        "//cdc_rsync/base:all_test_sources",
+        "//cdc_rsync_cli:all_test_sources",
+        "//cdc_rsync_server:all_test_sources",
+    ],
+    data = [
+        "//cdc_rsync:all_test_data",
+        "//cdc_rsync/base:all_test_data",
+        "//cdc_rsync_cli:all_test_data",
+        "//cdc_rsync_server:all_test_data",
+    ],
+    deps = [
+        "//cdc_rsync:file_finder_and_sender",
+        "//cdc_rsync:parallel_file_opener",
+        "//cdc_rsync:progress_tracker",
+        "//cdc_rsync:zstd_stream",
+        "//cdc_rsync/base:cdc_interface",
+        "//cdc_rsync/base:fake_socket",
+        "//cdc_rsync/base:message_pump",
+        "//cdc_rsync_cli:params",
+        "//cdc_rsync_server:file_deleter_and_sender",
+        "//cdc_rsync_server:file_diff_generator",
+        "//cdc_rsync_server:file_finder",
+        "//cdc_rsync_server:unzstd_stream",
+        "//common:path_filter",
+        "//common:test_main",
+        "//common:testing_clock",
+    ],
+)