HOVER: A few improvements

- Better touch outside touch input handling
- On touch outside hide both case (expanded and non) in 1.25 secs
- Tweak clear foreground notification when we are on the same app
- Code style
- Tiny cleanup

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: Ibb0c7c09ae3256bbf744f359cca651c8cb8112d9
Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/notification/HoverLayout.java
PowerManager : Make proximity check opt-in

Conflicts:
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml
	services/java/com/android/server/power/PowerManagerService.java

Change-Id: I4b67ad0b51882108baf1c494e38803af53312b0b

Conflicts:
	core/res/res/values/symbols.xml