ApfFilter - handle ipv4 frags correctly in mdns filter am: 97877376ad am: 0c666d39ca

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2860307

Change-Id: I1ce238acf9451c9319379cf46bd1f5e585bfd604
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>