Migrate to cargo_embargo. am: 6dbb08787b am: 556e90e8e5 am: 5b4f6a5573

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

Change-Id: Ia31bf9f4e6ffbd09b36cd829cc4b979e80bdc0e0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>