Generate license header with cargo_embargo. am: b0a24f426c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/anes/+/3206671

Change-Id: I6dcec81ecf3507adbf05a72b5daef0f7bd961e7e
Signed-off-by: Automerger Merge Worker <[email protected]>