Generate license header with cargo_embargo. am: dc39160d1c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/axum-core/+/3205900

Change-Id: Iebbdb277d0edf786ea47eed080bab0c58166cbfe
Signed-off-by: Automerger Merge Worker <[email protected]>