Migrate to cargo_embargo. am: 6dbb08787b am: 7c30f29a2e am: ab33bfe687

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/userfaultfd-sys/+/2835512

Change-Id: Ie6cfc9be98a690813a92bc5107bb04e974edf107
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>