Migrate to cargo_embargo. am: 5cffce16b3 am: ed950f3b8e

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

Change-Id: I321883e2af652789e1e27d5920c5361ddfd1eedc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>