settings: Privacy Guard support

 * Add toggle to InstalledAppDetails to enable/disable privacy guard flag on
   a per-application basis.
 * Add toggle to enable privacy guard by default for applications.

Change-Id: If03aa5319c520b6c4a78887f0f46ef1443ddaa83

Conflicts:
	res/layout/installed_app_details.xml
	res/values/cm_strings.xml
	src/com/android/settings/applications/InstalledAppDetails.java
Remove scroller options to fix Chrome scrolling

Change-Id: I0ce7946b864516d8fcbe3a33e1bf8fd9bfd06223