[PATCH 1/3] Add hfp_list_calls to get current call list

[Zhang, Zhenhua]

Hi Denis,

Denis Kenzior wrote:
> Hi Zhenhua,
> 
>> Use AT+CLCC to get current call list.
> 
> So I did things 'slightly' differently.  The new setup should
> be much simpler for both the plugin and the core.  I've tested
> it on phonesim, but not on HFP.
> Can you let me know if there are any issues?

It works fine on HFP and new code looks better than older
interface. I got 3 new PASS from PTS results. ;-)

> Regards,
> -Denis

Regards,
Zhenhua