Migrate to cargo_embargo. am: bcd78885ee am: 7c32bbd159 am: f671d2c8de

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num-traits/+/2832424

Change-Id: I1b965e4099d655960777baf7d69665dd463c8664
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>