Migrate to cargo_embargo. am: 5cffce16b3 am: 552f67c854 am: e0a61507f6

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

Change-Id: I09a2ceb87a5aa475946723329ef7f6b77f30c68f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>