Fixup TrafficStats test wrt mobile vs total vs loopback

- Use getMobileBlabla() instead of getTotalBlabla()
- Have getTotalBlabla() reflect the fact that it includes loopback.
- Adjust checks to take headers, acks, and packet counts into account.

Change-Id: I9e1dfbbbdb9a6f932a14a2e3baee7a34469b9008
1 file changed