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
Merge remote-tracking branch 'CM/cm-11.0' into cm-11.0

Conflicts:
	src/com/android/settings/SecuritySettings.java

Change-Id: Iacda7051db4b77c8456d0bd49788e8484471968b