Merge "Add script to run cargo_embargo on all external crates." into main am: a017908c56 am: edb4ceaa43

Original change: https://android-review.googlesource.com/c/platform/development/+/2888227

Change-Id: I453687751623cfe33e6f471d4f5cbd4353809fa4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>