Initialize call state phone app starts

If phone process crashed during an active voice call, even after restart
of phone app, clients still get call state as OFFHOOK since
TelephonyRegistry has the old infomration and whenever new client is
registered that old infomration is given resulting in erroneous UI
behavior. Present fix sends call state update during when phone app
starts so that TelephonyRegistry resets its information.

Change-Id: I709a8b4d78c50099c021ad5f78bbc9fdf6db6585
CRs-Fixed: 906539