Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I14809ab97633281ed3e9692f84fb15d1c4e12188
diff --git a/Android.bp b/Android.bp
index 9d4084f..4af2cfd 100644
--- a/Android.bp
+++ b/Android.bp
@@ -47,7 +47,7 @@
     crate_name: "openssl_macros",
     cargo_env_compat: true,
     cargo_pkg_version: "0.1.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     rustlibs: [
         "libproc_macro2",