Dump underlying BPF traffic stats as well as higher-level stats.

This provides a better way to tell whether traffic is flowing.

Test: manual
Bug: 190783768
Original-Change: https://android-review.googlesource.com/1737393
Merged-In: If557b0a18fc0aea1bf6a65d91547fc1930098ed0
Change-Id: If557b0a18fc0aea1bf6a65d91547fc1930098ed0
1 file changed