Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I2ede2fbc95fe3ca5480cf5823ceff402b23679c7
diff --git a/Android.bp b/Android.bp
index d32e137..adc1bbc 100644
--- a/Android.bp
+++ b/Android.bp
@@ -24,7 +24,7 @@
     crate_name: "mls_rs_codec",
     cargo_env_compat: true,
     cargo_pkg_version: "0.5.3",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2021",
     features: [
         "default",