Migrate to cargo_embargo. am: e90c88724d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/fallible-streaming-iterator/+/2824660

Change-Id: Id32a54d54406f053d09fc78a392faf8b5fd10a34
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>