Add ConnectivityCoverageTests to postsubmit

Add the tests to both postsubmit and mainline-postsubmit.

This should allow moving the tests to presubmit in the near future,
after they have been verified to pass in postsubmit.

Bug: 187935317
Test: treehugger needs to test
Change-Id: I9a05d6a300c5f777497e867d0456bc59b06eee80
2 files changed