Do not restart printSpooler when switching portait mode / landscape mode

When the configration changes there are two modes to handle it:
1. do through a onDestroy - onCreate cycle
2. declare that your activity can handle certain changed and handle them
   in onConfigurationChanges

For most apps (1) is zero effort to implement, hence it is the default
behavior. You only want to do (2) if recreating your activity is
expensive.

As recreating the printActivity is expensive (and currently even
impossible) we want to handle the configuration change gracefully. There
is no code to be added as handling portrait mode / landscape mode switch
is not different from an orientation switch.

Bug: 25727559
Change-Id: Iac5b854c9dd080a4432957bc4551162dc3d480e9