Android U Beta 1 GPL
Make futures-macro available to product and vendor am: d7d8eb6f83

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-macro/+/2475615

Change-Id: I0a7e26fb7d726fff75434afd8c70da191423c033
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>