Migrate to cargo_embargo. am: c82ca0ec5e am: f64ec43c07

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/octets/+/2824490

Change-Id: I287f0388f6fa25c5a3f1f4c925f5cb4bc00a925f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>