Upgrade futures-macro to 0.3.30 am: 6ee23ca803 am: defd407eef

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-macro/+/2942547

Change-Id: Icf073650825819e2a4924f03f8b3640bba1810f7
Signed-off-by: Automerger Merge Worker <[email protected]>