Framework: Forward port Fixes

1)  NPE in Power penu

This fixes the NPE when the Reboot item is disabled and the Profiles
switcher is not

2) NPE in notification manager if profiles disabled

No active profile group is returned and a NPE is triggered when a
notification override is being set

Change-Id: I5fa003ce08daf5ef86ddeca5d432dcea2e34a718