Migrate to cargo_embargo. am: caf5fb6a44 am: 7b34dceec6 am: e62b135b03

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

Change-Id: I5a15b4984bdfdf1366fc67a885a20e35bef9991f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>