Addition of eBPF requires tweaks regarding packet counting of UDP-encapsulated-ESP packet bytes. This patch conditions the expected number of bytes received based on eBPF being enabled Bug: 74113670 Test: Ran CTS tests, passing on 3.18, 4.4, 4.9 kernels Change-Id: If02a4bb6ebfdf949fdb58b5816aa9d252d9eef52