Status bar: Add battery bar, (1/2):

Thanks to the (unknown) author.

- Battery bar position:
  - Disabled
  - Top of status bar
  - Top of navigation bar
  - Bottom of navigation bar
- Option to show the battery bar center mirrored
- Option to enable/disable charging animation
- Battery bar thickness (1- 2-, 3- or 4 dp)
- Battery bar color

Additional changes:
- Battery bar frame, (uses the battery bar color with a transparency of 40%)
- Colorize the battery bar (and frame) to red (bar: ffff3300, frame: 66ff3300),
  if the device isn`t charging and battery status is 15% or below
- Add reset to Android default, to support themes,
  (all colors will be loaded from SystemUI,
  as the battery bar isn`t a part of CyanogenMod,
  CM default colors for the battery status icon/ring will be loaded)
- Add reset to DarkKat default

Change-Id: I74ed33f0d375b3727a2b28a9bf550c26ea9bad4c