Migrate to cargo_embargo. am: ce94bae5eb am: 681fe3b895 am: 1f139fc9dc

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/clang-sys/+/2833291

Change-Id: Id82dc2943d999f301c530db596a5fa2c8955a6fb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>