Dialer: improve ipcall

Change-Id: I96fbc51816f047a6ff1160b9b05e984b862fe8de
Dialer: DirectCall support

Change-Id: I5601fcdf5007786e8785c7791915f777f6969182
Dialer: code cleanup

Change-Id: Ie4a9a0f4aef179ebc2e3d792fde8bc4ace1882b2
Dialer: fix new api

Change-Id: I8633c319530d79ab6333bf2933ff4659e4c980f3
Dialer: fix new api

Change-Id: I832fd343c55bfc3990bb0a86999b1af04461ad3b