Update XFRM/VTI Tunnel mode tests to use output_mark

Change the XFRM tunnel and VTI tests to use the output
mark to select the underlying network.

Bug: 62633844
Test: run_net_test.sh xfrm_tunnel_test.py
Change-Id: I76ffa468ff71a3e27d256a6284ff946dd3c94142
2 files changed
tree: 8f53f88de53e00224b06a7e3d8ac032cae6d8d85
  1. net/
  2. OWNERS