Merge "rust: Use rust_ffi for Rust generated C libraries." am: 5b757feed9 am: f2f8c8599f

Original change: https://android-review.googlesource.com/c/platform/development/+/1530159

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I53f6c224575568b888a37223ea503af23bcc845b