SystemUI: Add sound item in quick settings panel

Add sound item in quick settings panel.

CRs-Fixed: 715258

Change-Id: I090929a3622101edc5413afe4f7c2d1863139d2c

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QSTileHost.java