Make num-traits available to product and vendor am: 51edc814c9 am: 042ce6291b am: b92db87873 am: 0e4a389e0c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num-traits/+/2476464

Change-Id: I04e7087c652311a22d3132c92dc57f6fca3df17a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>