Migrate to cargo_embargo. am: 0e6f36886f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/scopeguard/+/2828110

Change-Id: Ie4bc13016b7c50d6db189ae67bb34652dde82af2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>