Boeffla-Sound: Engine 1.6.5

- allow speaker minimum level of 20

Change-Id: I19511a5704c8a67e6591d488281cfe9c09822ed9
Boeffla-Sound: Engine 1.6.6

- allow minimum volume of 0 for both speaker and headphones

Change-Id: Ifaa3c5bf90485c9a40726a67201799fa45da60f2