Migrate to cargo_embargo. am: 1e28b52033 am: a17ec46739

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/clap_lex/+/2826412

Change-Id: Ibc94c73743ac7f62c5e6d809ce500708e8a383ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>