BpfUtils.h - add back SKIP_IF_BPF_NOT_SUPPORTED macro am: 67fa2073ff

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1631935

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4319f83b426be2800ee92f3fb900ad98ec597ed9