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 branch 'cm-11.0' into kk_mkt

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

Change-Id: I9042b84d78877cdf2b0d945855f1b414c2ff9540
Settings: Disable hide overflow option when force showing nav bar

Change-Id: Icde48fa8dd3e3538a4660c202e5e11205f0891b6