Fixes creation of incorrect SIP PhoneAccountHandle

When a new incoming call occurs in SIP, SipUtil mistakenly uses the
Uri handle instead of the profile name to create the
PhoneAccountHandle. Since this PhoneAccountHandle is not registered
with telecom, it will throw a security exception (as of b/26864502).

BUG: 26874216
Change-Id: I27611b45f0834fca328c4cc2b867edaf970f7171
