Upgrade async_task to 4.3.0 am: 1d8091d3e6

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-task/+/2327654

Change-Id: I312b4debe20433b9ede9169418ae72317b07b80e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>