Migrate to cargo_embargo. am: caf5fb6a44

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/nom/+/2796354

Change-Id: I395d9fb6f0bb737c647a72099fb40f0ff888abd3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>