Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: Ic2cb3c02252ce494f9ccf5b16d7b4dad14a68869
diff --git a/Android.bp b/Android.bp
index c37b42f..3712a20 100644
--- a/Android.bp
+++ b/Android.bp
@@ -8,7 +8,7 @@
     crate_name: "config",
     cargo_env_compat: true,
     cargo_pkg_version: "0.13.4",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: [
         "json",