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.

cdc_indexer/BUILD

@@ -0,0 +1,35 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_binary(
+    name = "cdc_indexer",
+    srcs = ["main.cc"],
+    deps = [
+        ":indexer_lib",
+        "//absl_helper:jedec_size_flag",
+        "//common:path",
+        "@com_google_absl//absl/flags:config",
+        "@com_google_absl//absl/flags:flag",
+        "@com_google_absl//absl/flags:parse",
+        "@com_google_absl//absl/flags:usage",
+        "@com_google_absl//absl/random",
+        "@com_google_absl//absl/time",
+    ],
+)
+
+cc_library(
+    name = "indexer_lib",
+    srcs = ["indexer.cc"],
+    hdrs = ["indexer.h"],
+    deps = [
+        "//common:dir_iter",
+        "//common:path",
+        "//common:status_macros",
+        "//fastcdc",
+        "@com_github_blake3//:blake3",
+        "@com_google_absl//absl/functional:bind_front",
+        "@com_google_absl//absl/random",
+        "@com_google_absl//absl/status",
+        "@com_google_absl//absl/strings:str_format",
+        "@com_google_absl//absl/time",
+    ],
+)