Make futures-macro available to product and vendor am: d7d8eb6f83 am: 493c8b721a am: e8eb2ffaac am: df42857701 am: 48b69b004e

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

Change-Id: I7947a3ad373a4c73acc22ea755aed0364f80b87e
Signed-off-by: Automerger Merge Worker <[email protected]>