BpfClassic.h - more helpers am: 73df7414f1 am: c1b2eb1fb6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2770598

Change-Id: I965f3965018a355a8b0f918eccd47b4d839f19cb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>