Migrate to cargo_embargo. am: e825bb0b3e am: 37dca1dbc5 am: 3924c3ab91

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/shlex/+/2828191

Change-Id: I787033e8c2615bf673d67f90a9451653f4408166
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>