Clean Up code && Optimiz Clear Button
Camera Tile [1/2] (Credit to CyanogenMod)

Change-Id: If8a1a44f919729f9fa01751626f69ddc6ffdacb5

Conflicts:
	core/java/com/android/internal/util/liquid/DeviceUtils.java
	core/java/com/android/internal/util/liquid/QSConstants.java
	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java