CPUFreq Tile [1/2]

Change-Id: I2093764a9dc1289522cbd0cf6b3fb0bd02dc556e

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