Migrate to cargo_embargo. am: f516a00dd9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/argh_shared/+/2799193

Change-Id: Ief1a59a0947ff8b39691d5f80b8989b99eaa3ed2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>