Migrate to cargo_embargo. am: f13a18b8e7 am: f8bf439bbe

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/libloading/+/2838079

Change-Id: I781ef24117c0c529b7967c90212bf2eccfe9185c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>