Base: add QuietHour Tile

Conflicts:
	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java

Change-Id: I920ccc83e7ef217a3430a8c3b5aed12a347aeaae

Conflicts:
	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsTileFlip3d.java