Reclassify OFL as notice per cl/537072410 am: 1c40cc399c am: c4c8581aeb

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

Change-Id: I41487f7940ae79ce1c88841afbf99ebc1eb070ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>