Add BPF helpers for ipv4/ipv6 and tcp/udp offsets. am: 1db34f3b91

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2400012

Change-Id: I53a28d9c2f1fd05b5614669c519cf67c16b2ffee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>