Settings: Add effects suppression text to Ring volume.

If the effects are being muted by a notification listener, display
a "Muted by <x>" msg instead of an active slider inside the
Ring/Notification volume setting pref.

Update volume pref design to optimize for this new custom appearance.

Depends on frameworks/base:
  Icdb5f85eb4bcaa1ead7d77c1460e06ad3f0604d5

Bug: 17461563
Change-Id: I6da871e16009370402451a2ff507de4762644a80