Migrate to cargo_embargo. am: 890d762137 am: ed480fc4bb am: 6af9f8cd4a

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

Change-Id: I51a7a53b87c48f7e7803c896cf7a36c21fd7f53a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>