Restore ACT_UNREACHABLE

This got lost in between
  I7d9752e86fa1a4564c622152a5be6ce2c1eda150 and
  If23df0760c6eb0ad137fc26c5124e48edf23b722.

Which broke creating the UNREACHABLE network, also breaking the dummy
network which should be created after it.

Fix: 28304838
Change-Id: I31c4ca9c3f53d6162b50e5bc46e27cfcd1b6a314