Make libnum_cpus available to DnsResolver am: fb8d539429 am: 2afb2e047e am: 7067450e17 am: cfce29c65a Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num_cpus/+/1705046 Change-Id: I8a93090e08949c975369b9b35521ec0b3f5cbb59