Reclassify OFL as notice per cl/537072410 am: 166fa84e6a

Original change: https://android-review.googlesource.com/c/platform/external/google-fonts/karla/+/2611418

Change-Id: I8a7249d591a7167a59ee17f2d60d0913e5109bc6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>