Phone: It should stay at Sip account details interface after unlock phone

When the SipEditor was paused, it auto save the editing Sip account
and finish the Sip account details interface.

Don't finish the Sip account details interface when the SipEditor
paused, then make sure it can stay at Sip account details interface
after unlock phone.

CRs-Fixed: 424610

Change-Id: I2f6c9eb85ed57531338fd88ffec7de2c8d2f6a21