Make async-trait available to product and vendor am: 9c88d08347 am: cd98a99aa9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-trait/+/2476131

Change-Id: Idc3956be7961846fc7d6ea5003b1c66055964b90
Signed-off-by: Automerger Merge Worker <[email protected]>