Upgrade rust/crates/futures-core to 0.3.16 am: 11bb2279e2 am: db7ccefc7e am: b2bc76140c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-core/+/1791031

Change-Id: Ib44b8d79ca2adf6a8dbcf921acc2f53dee9a14e9