Migrate to cargo_embargo. am: 5cffce16b3 am: 552f67c854

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/openssl-macros/+/2824491

Change-Id: Ib1078c0fcc5cb68c70a797bec2acb3c3e74926d4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>