Update Android.bp by running cargo_embargo am: 6538921ca9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio-util/+/3096319

Change-Id: I9d59ac97d41c309e0b5e6bddccfdaaeabaa9864d
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/Android.bp b/Android.bp
index 4d19f54..af22c82 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,5 +1,7 @@
 // This file is generated by cargo_embargo.
-// Do not modify this file as changes will be overridden on upgrade.
+// Do not modify this file after the first "rust_*" or "genrule" module
+// because the changes will be overridden on upgrade.
+// Content before the first "rust_*" or "genrule" module is preserved.
 
 package {
     default_applicable_licenses: ["external_rust_crates_tokio-util_license"],
@@ -24,7 +26,7 @@
     crate_name: "tokio_util",
     cargo_env_compat: true,
     cargo_pkg_version: "0.7.10",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2021",
     features: [
         "codec",