Migrate to cargo_embargo. am: f516a00dd9 am: 15e3120029 am: eb838a5052

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

Change-Id: I70a700aba3408368300a6df2101576b524fb2e18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>