Reclassify OFL as notice per cl/537072410 am: 1a85bfcdd8 am: 9d3077f3c6 am: 348ec68707

Original change: https://android-review.googlesource.com/c/platform/external/google-fonts/arbutus-slab/+/2611417

Change-Id: I5438c9a9d9fa6f869adc0d873f7d65a17f55d601
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>