[review] Voice implementation fixes

[Dan Williams]

On Fri, 2018-06-15 at 01:05 +0200, Aleksander Morgado wrote:
> Hey,
> 
> I've pushed a branch to gitlab for review:
> https://gitlab.freedesktop.org/mobile-broadband/ModemManager/merge_re
> quests/2
> 
> It includes several fixed and improvements in the voice API
> implementation for generic and huawei modems. I've been able to
> validate and test all APIs successfully now with a u-blox TOBY-L4.

Merged.

Dan