When the default network goes down we lose the wake-on-incoming-data capability until the new net is brought up and apps rebuild their connections. We fixed this in Wifi, but it's a general connectivity issue, not a wifi issue so moving the mechanism to connecitivty so other networks can use it. bug:2734419 Change-Id: I39b5d825eb6b548bd9bb8f179b89254f4db53147