Reclassify OFL as notice per cl/537072410 am: 8449e4b2e7 am: 876ac4993e am: d69f837ad8

Original change: https://android-review.googlesource.com/c/platform/external/google-fonts/source-sans-pro/+/2611877

Change-Id: Id7aa1c0cd05493cf8e110a15c46fca5096c02a8a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>