Fix issue during swapping of SIP and CS calls.

Since SIP phone account id is different from Telephone account id
hold/unhold was not issued correctly during swapping of sip and cs
calls. To fix this, avoid comparing the account ids if one of the
calls is a sip call.
Also make sure that there is no LCH update during active/hold sip
calls.

Change-Id: I46955d1b750cf6336c59fddb03fa1e996d768c28
CRs-Fixed: 738816