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

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

Change-Id: I73dad252e35b95ab06d2fff929588ad3ebc96497
Signed-off-by: Automerger Merge Worker <[email protected]>