Make futures-util available to product and vendor am: e07497862c am: cf9fa42930 am: 28d6c4fdda am: ad1d27fb7b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-util/+/2475386

Change-Id: I98d6d2c420069cfae78fce75f55417f54811edcf
Signed-off-by: Automerger Merge Worker <[email protected]>