Reclassify OFL as notice per cl/537072410 am: 7f1841380b am: bb6391cf05 am: 571dfaceeb am: 77ef2602cc am: 823758c1aa am: 1f8a831c80

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

Change-Id: Idb04cb383cfce1476c99ccab5484879b013744c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>