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

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

Change-Id: If5f59c362fe36bc9e690e6d44589c86c43f47d06
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>