Migrate to cargo_embargo. am: 890d762137 am: 5be7270e88

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/linkme-impl/+/2822777

Change-Id: I38f20ea0e76220194367b14346c62ef805200ca0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>