Migrate to cargo_embargo. am: 4a9384f6a9 am: 275124f2f9

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

Change-Id: I82dc1ed75032272640fb0a393e485314ef6dd6e5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>