SystemUI: don't crash when user disable default apps

If the user has disabled the default clock or calendar application,
System UI will crash when the user clicks the Clock or Calendar
from the notification bar. This patch fixes the issue.

Change-Id: Icdc3679cdd35b5b3a24086e1ada67d0defabc5cb
PackageManager: Let system-defined permissions take precedence over settings

If a permission was already present in the device's settings due to having
no prior system definition, and the system tried to take it over
(after a version upgrade, for example), it'd fail, since the saved
value would clobber the one previously read from the permissions XML.

This breaks system-behavior changes (gid grants, in particular) unless
the user performs a factory reset after upgrading, which isn't acceptable.

Change-Id: If2e44110f6db735ad29cdf1086e814bd1299e290
Use generic alarm intent.

Change-Id: Ibb911c1e34ec95cdd52867b8a68cce25f09dbc10
Frameworks: add never sleep screen mode (1/2)

to qs ScreenTimer Tile
to PW ScreenTimer toggle
as general option as well

Change-Id: Ic78356c1b96044562efbce3cb0d0d5c93d773a19
privacy guard: changes part 1

the new cm implementation from our privacy guard is not the best.
Some changes we needd to do next week. For first give back the ability
to filter critical apps + do not show apps without any permissions

to do
- enable only the critical permissions the app is using
- add another active icon to notify the user if he modiefied another permission then the default ones
- add ability to disable notifications

Change-Id: I59fac120dd00126533e99cb65f5136b11f42e20b