Set up ports after verity check for real device setup

In case of using freshly flashed devices, a reboot is trigged in
ensure_verity_disabled, port forward and reverse should be setup after
the reboot to ensure backing process start success.

Bug: 196088041
Test: gd/cert/run
Change-Id: I07e9a7a3a64ee6b44aca1b1b4cde2074661532e3