Generate license header with cargo_embargo. am: 730a8ca824

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/android_log-sys/+/3206670

Change-Id: I1d816e9f174a790a2e7932e089cdf80373072a10
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>