Migrate to cargo_embargo. am: 3530b1801c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/thiserror/+/2834455

Change-Id: I30cb26938b5b46ac03732c553ece983f60ac23d2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>