[1/2] Improve flash availability check.

* Use simple overlay, default false.

PS2: Add header and proper symbol.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I40458959d738fbd82941a19ff1ffcfa236bffcb9
Fix double finger to pulldown statusbar when QuickPulldown is disabled

PS2: Better fix

Change-Id: I738d8113be5b6fd04417b7e2d2ba31a710bd7615
Merge remote-tracking branch 'PA-base/kitkat' into kitkat-remix

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/pa_symbols.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java