Reclassify OFL as notice per cl/537072410 am: 7f1841380b am: bb6391cf05 am: 571dfaceeb am: 77ef2602cc am: 823758c1aa

Original change: https://android-review.googlesource.com/c/platform/external/google-fonts/zilla-slab/+/2611895

Change-Id: I6081ae23ba411b63e5217019bc20e7a425c1c471
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>