Settings: Remove lockscreen options from security.

  - Create a separate fragment for Lockscreen settings
  - Move App Security up in Security Settings
  - General clean up

Change-Id: I4dc20942b87c2446c7e798e28f7e475efebaddb8
[2/2] Battery light: Add 100% charged level
[2/2] Profile: Screen timeout
[2/2] Buttons: Switch to last app
[2/2] Global actions: Mobile data
[2/2] Global actions: Wifi
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] Low battery warning policy
[2/2] Recents clear all button
[2/2] Recents RAM bar
[2/2] Network traffic indicator
[2/2] Lockscreen notifications