Migrate to cargo_embargo. am: 6dbb08787b am: 556e90e8e5

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

Change-Id: Ia9fb08f4ca7f769209f32f37511d27ae3eba7277
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>