Update Android.bp by running cargo_embargo am: 215ed4b722

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/vhost-user-backend/+/3095970

Change-Id: Id054e3062ce17a62687ef9837c71139b1bf71879
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>