Migrate to cargo_embargo. am: 1995e408fd am: 778c748120 am: 9e47a4545b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/libfuzzer-sys/+/2832653

Change-Id: I099b3235cef1cfebeffd04835b8fec0cd643fa5f
Signed-off-by: Automerger Merge Worker <[email protected]>