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

Change-Id: Ic8f534909a1a654a71ec1bc5be556fe3e884583f

Conflicts:
	packages/SystemUI/res/layout/status_bar.xml
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java