Reclassify OFL as notice per cl/537072410 am: 1c40cc399c am: c4c8581aeb am: 487dc6a14a am: a936b27b93 am: 1947ae7d1c

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/2612135

Change-Id: I54e925bca35e4303012af511410a322fb012623e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>