Migrate to cargo_embargo. am: bcd78885ee am: 99ac0512be am: d6aaa6bd86

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

Change-Id: I528c6465c02e9dce9d400918d3ceae060b7cef3f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>