Proper supplementary service notification handling (3/5)

Pass parsed call properties around instead bleeding the implementation
detail 'Supplementary service notification' into all layers.

Change-Id: Ib7c3a494024013c261b1d708c47d0e80ae5876dd
telecom: fix ringtone NPE when profile is set to silent

If ringmode is set to SUPPRESS ringtone manager returns a null ringtone.
Note: to repro exception set profile to silent, then configure, click
on phone app group, and set ring mode to "off"

Change-Id: Iaa80a628d9d80f1741d5a4c736a34e0cbbe00685