Migrate to cargo_embargo. am: 9de62355ce am: 2ca8d65c8c am: 57af753754

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-executor/+/2822541

Change-Id: I7ffe15a178d08f4905945b72f4db2f9a7f331d9d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>