[automerger skipped] Make libfutures available to DnsResolver am: aae8339fbc -s ours

am skip reason: Merged-In Iaa62fbc01e96a9cba19c3353bf7b64ff45dd21d1 with SHA-1 4ddbd191c5 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/rust/crates/futures/+/15067043

Change-Id: I9ef032fbe6e4f796447605e41d60a17cb9401621