[1/2] Settings: HALO

Forward port from jb43.

PS1: Initial port
PS2: Fix conflicts with notification LED
PS3: FIx derp in strings
PS4: Fix derp in pa_arrays (tag not closed)
PS5: HALO Mods

Change-Id: I7de6a9157415fe05b0a59d8260e33cc1527a342d

Conflicts:
	AndroidManifest.xml
	res/layout/installed_app_details.xml
	res/values/pa_arrays.xml
	res/values/pa_strings.xml
	res/xml/settings_headers.xml
	src/com/android/settings/applications/InstalledAppDetails.java
Halo: Add master switch to disable Halo (2/2)

Change-Id: I276bf91156ba66c167011661de1b87d34fc88f4f