Migrate to cargo_embargo. am: c82ca0ec5e am: 33869b5d14 am: b94551a354

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

Change-Id: I32d0d3dfd1e43f95821f2f34db0581ff5ce3a0a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>