Migrate to cargo_embargo. am: 247db62d4b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/lock_api/+/2829974

Change-Id: If62a16eab14262ae49313c069573f218d62a24b4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>