Fix out of date comment in the APF Arp filter am: 72488ca020 am: 3621f36320

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2840298

Change-Id: I9f2dfd841a3e7b9b24136ca43e30ade67fe9383e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>