Migrate to cargo_embargo. am: a4c1350c71

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tracing-attributes/+/2836876

Change-Id: I386e62b93b51dcb483bfdea2bb15cd78c569899b
Signed-off-by: Automerger Merge Worker <[email protected]>