Make futures available to product and vendor am: 78fb99c7e0 am: 2f4ff8f1b3 am: c6eb100882

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures/+/2476407

Change-Id: Idf90a4dcfa22f6263de949692e126a52fddcb281
Signed-off-by: Automerger Merge Worker <[email protected]>