Settings: Add fast charge QS tile..
this commit add
- qs toggle
- interactive reacting with pw toggle
- option stays after reboot
- code cleanup
port from Slim4.3, adjust for 4.4
see more: https://github.com/SlimRoms/packages_apps_Settings/commit/bf03477f69bafd716e64f71c0b8e0ed93b2b3629