Add metadata files for walkdir.

Bug: 155309706
Change-Id: I4f800df92cf1ea47b05109dba9465c689649146e
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..c3c8ccf
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,16 @@
+// This file is generated by cargo2android.py --run --device --dependencies.
+// Do not modify this file as changes will be overridden on upgrade.
+
+rust_library {
+    name: "libwalkdir",
+    host_supported: true,
+    crate_name: "walkdir",
+    srcs: ["src/lib.rs"],
+    edition: "2018",
+    rustlibs: [
+        "libsame_file",
+    ],
+}
+
+// dependent_library ["feature_list"]
+//   same-file-1.0.6