Reclassify OFL as notice per cl/537072410 am: 166fa84e6a am: 2c93bf1691 am: e6e1657bb9

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

Change-Id: I9cc2a2e49550228e21b5b3f35d03a9593201ce2d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>