Add Python script for generating sample APFv6 ARP offload program am: 571222c458 am: 46739bcecf

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/3171679

Change-Id: I69a21321b0eff77da7c8e7eb787759c3cc7d9fcc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>