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

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

Change-Id: Id5fe91bdb5ecbb39bae761cffd4d5738fd7def18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>