Migrate to cargo_embargo. am: caf5fb6a44 am: 8427f73c71

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

Change-Id: Ie75d15e6e413cd07f3da904f4e2ba6975f22a2ab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>