Merge "Make num-traits available to virt apex" am: 5504e4246f am: 51757ca475 am: 9fda93e538

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num-traits/+/1611934

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I0a8d93253fd8fe6e5d2fa69b6bddfa75d6137704