Add SKIP_IF_BPF_NOT_SUPPORTED macro in BpfNetworkStatsHelperTest.

Notice that BpfNetworkStatsHelperTest testcase fails in some platforms
who doesn't support BPF feature.

Test: BpfBasicTest netd_unit_test netd_integration_test
Change-Id: I36737c567782db1c3b6561a0b6b259dec4eca945
1 file changed