Settings: Slims ElectronBeam get some love (2/2)

Features:
- You can select different crt off animation modes if device overlay does not disable it at all
- disabled
- always horizontal (stock behaviour)
- always vertical (screen collapse from left and right to the middle)
- orientation dependent (means portrait = horizontal animation, landscape = vertical animation)
- some minor fixes/code style improvements to 4.3 implementation

Conflicts:

	res/values/slim_arrays.xml
	res/values/slim_strings.xml
	res/xml/display_settings.xml
	src/com/android/settings/DisplaySettings.java

Change-Id: Ib8b2a1ab3bcbf7c62581e217ffd700e736e14e19