Generate license header with cargo_embargo. am: 63f2d151d5 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/arrayvec/+/3205896 Change-Id: Ic41f9d2fa630ca5bfc0192384401d2cc78b2baba Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>