Migrate to cargo_embargo. am: a5a5eebce0

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bytemuck_derive/+/2822379

Change-Id: Id3726490b77a6984907fe0432e6c144f4cb41982
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>