Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: Idcab21dd20aa4fc4c1016467d1be6694ceff1f09
diff --git a/Android.bp b/Android.bp
index 3c2485c..058c27e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -45,7 +45,7 @@
     crate_name: "futures_core",
     cargo_env_compat: true,
     cargo_pkg_version: "0.3.30",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: [
         "alloc",