PrivacyGuardManager: Reduce calls to getFragmentManager

Change-Id: I74f07a58b09cf0e9114d0c1c56e9a97d55ab0900

Conflicts:
	src/com/android/settings/cyanogenmod/privacyguard/PrivacyGuardManager.java
 Halo: Add switch to disable and hide the status bar icon for Halo (2/2)
This reverts commit 308cf9e.
erase some duplicate halo strings and get sabe a litle rusty