Migrate to cargo_embargo. am: ce94bae5eb am: 41fc785321 am: efb3aaa1d4

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

Change-Id: I8e07ecee9075ab616def5483d66fd4e09e1deeba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>