Fix out of date comment in the APF Arp filter am: 72488ca020 am: ef20186283 am: fd6a00f56c

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

Change-Id: I395c7ffba89aa3aa923dd6677877360c56c7e583
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>