Make num_cpus available to product and vendor am: fd7e77a0a9 am: 79f4eeca1e am: d3fe38d433 am: 4c84410f0f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num_cpus/+/2476309

Change-Id: I3955b1c88840c765945526750c8370f9e9ac1fa5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>