Update Android.bp by running cargo_embargo am: 6649b6f4e6

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/maybe-async/+/3208715

Change-Id: I92232dcb167ae3527b93eac1b96cde9ba0503055
Signed-off-by: Automerger Merge Worker <[email protected]>