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

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

Change-Id: I9f3afd8d0882d9f91a62b0bf2c0f593829466361
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>