Fix futures-task/METADATA am: 7d901038a3 am: f9883fdb2b am: 3abc7c582c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-task/+/1413810

Change-Id: Ifae50d744ed9da9876d1ee320ae0f82de7dddc5b