Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I779bf8c21ceca5c0846f740291ab13dc411a81d3
diff --git a/Android.bp b/Android.bp
index 0a7db8d..0b8d343 100644
--- a/Android.bp
+++ b/Android.bp
@@ -27,7 +27,7 @@
     crate_name: "buddy_system_allocator",
     cargo_env_compat: true,
     cargo_pkg_version: "0.9.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2021",
     features: [
         "default",