Add hardware tethering traffic in testTethering test

Test: atest com.android.server.net.NetworkStatsServiceTest#testTethering
Bug: 162292214
Change-Id: Ifec6bde5fd3231f2135f12536c42e42ec6b707de
1 file changed
tree: d3cf04705d5619dc0689318bd11a9cb4d3f5e9a6
  1. core/
  2. services/
  3. tests/