Migrate to cargo_embargo. am: 906d1a2cb9 am: c2509a3814 am: ab6225494d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/static_assertions/+/2832578

Change-Id: I441717887d48b22bd7d482ade4f08267d4a88453
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>