Lockscreen: Add battery status ring around unlock ring, (1/2):

Based on OmniRom:

https://github.com/omnirom/android_frameworks_base/commit/70933a618981c5a7c7824403f52f74c8c8f1762d

Included:

- Enable/disable battery status ring
- Option to load default color values from theme/system
- Display battery status ring dotted/solid
- Customize ring dots, (lenght, interval, offset)
- Custom battery status ring color
- Custom battery status ring charging color

Colors:
While charging, display the charging color.
Without charging and battery status is below 14%, the color turns into red,
otherwise, display the ring color.

Change-Id: I610fc36216fe4e7b01d867ff1f7f90bda0557ee7