Migrate to cargo_embargo. am: 4a9384f6a9 am: 59a60b20d5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pathdiff/+/2824493

Change-Id: Ib96edf5374da7aa0294de3eb01e5526f43021f44
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>