SystemUI: Add sound item in quick settings panel

Add sound item in quick settings panel.

CRs-Fixed: 715258

Change-Id: I090929a3622101edc5413afe4f7c2d1863139d2c
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Enable Audio Tile

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>