Upgrade futures-macro to 0.3.28 am: 96009b4e62 am: 4a06070bb9 am: 9c7fd70a43 am: 2d56f12984

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-macro/+/2520196

Change-Id: Ib606174a1c4b32242a73380631b62bd824ebfd36
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>