Merge "Make libfutures available to DnsResolver" am: 197de3f937 am: 8761d9075f am: 401211bf30

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures/+/1742081

Change-Id: Ia34bd7e531439e317ad23727f091206968a83cf5