Add Python script for generating sample APFv6 mDNS offload program am: df0b7f09a9

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/3380873

Change-Id: I41d27b34e125e2509080c9678418d80756932921
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>