Migrate to cargo_embargo. am: a67d260523 am: c493d58588

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bencher/+/2797709

Change-Id: I76fafec707ce36c83bcd2b1d90d81151d702aa84
Signed-off-by: Automerger Merge Worker <[email protected]>