BpfUtils.h - switch to GTEST_SKIP in all 4 SKIP macros am: 5460527c74 am: 4273296e72

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1888239

Change-Id: I4afcf1529820587e2ee79991a877d2034643ef59