IMS: Don't create IMS phone when switch to SIP Phone

SIP Phone creates IMS phone while phone switch to SIP
phone when dial an SIP call.
Don't register receiver for Ims service state change
and SRVCC state change in case of SIP phone.
This way creatation of duplicate IMS phone will be
prevented when switch to SIP phone.

Bug: 22126128
Change-Id: I1206aaab703fec70107554352c2728e7dd42578e