QuickSettings: Allow customization of Tiles per Row (1/2)

Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>

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