Frameworks: Statusbar clock and date customizations

Some things changed on kitkat + our old code needed in general a bit
rework. All done with this patchset.

This commit add support for:

- Clock and date enable/disable
- Clock and date position
- AM/PM styles multilang support
- color
- Date format
- Date style

Originally by kufikugel. I only ported it to 5.0

PS2:
- several fixes and optimizations and code cleanup

PS3:
- more adaptions to LP

PS4:
- cleanup

PS5:
- animate hiding correctly on center clock mode

Change-Id: I456bc81c0c981c04467c9908c164e7c3b6cb75d3

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarTransitions.java