Settings: New Changes

- Move Lockscreen, Notification, Buttons and Statusbar Settings
  to PAC settings.
- Move Device specific features under Device category
- Active Display icon from @AOKP
- Statusbar Icon from @DirtyUnicorns-KitKat
- PAC icon from @pvyParts :P

Change-Id: I9884ff1f5bd5edc2d8788c63e7df590be8fc26ae
Signed-off-by: Lokesh Chamane <lokesh.c703@gmail.com>