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

Removed clock color settings
SystemUI: Status bar clock - fixes

This commit fixes:

- no overlapping more from status bar icons on center clock.
  The width depending on what the user has setuped (date and clock) is exactly meassured now
- do not start animations if they are not needed
- reduce settings provider calls
- a bit cleanup

Change-Id: I7a37a6ae8f9bad0f265119af05dc20cf21cd6890
SystemUI: Ensure that the Clock is actually enabled in IconMerger

to device if we need to calculate

Change-Id: If12b0e26b32f044f1a82cf8b539283194d1d0b4c
SystemUI : Port forward statusbar brightness control

Brings back the status bar brightness control from cm-10.2/cm-11

Change-Id: Icc04e7da3286e9925f8b90528c1e022b33d33e9d
SystemUI: improve brightness slider behavior

Mimic the brightness slider behavior in the statusbar.
This adds logic to make the statusbar slider also work with automatic
brightness mode enabled and it will instead adjust the temporary automatic
brightness overrride.

Change-Id: I78814a785decc83df94844fcc2f489c8cbec2b65
Signed-off-by: Roman Birg <roman@cyngn.com>