Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I19d5fc3d7b5ef5c8ffd789e2333ef0f636d9b4da
diff --git a/Android.bp b/Android.bp
index 908ee9a..756bcef 100644
--- a/Android.bp
+++ b/Android.bp
@@ -46,7 +46,7 @@
     crate_name: "document_features",
     cargo_env_compat: true,
     cargo_pkg_version: "0.2.8",
-    srcs: ["lib.rs"],
+    crate_root: "lib.rs",
     edition: "2018",
     features: ["default"],
     rustlibs: ["liblitrs"],