Migrate Emergency call profile

In some situation, such as Single Radio Voice Call Continuity (SRVCC)
completed, connection is switched between ImsPhoneConnection and
 GsmCdmaConnection, and we should migrate the information that
 includes emergency call information we added in Q.

Without this, the migrated connection does not have the correct
emergency information to do further functionalities, and the metrics
 are not accurate.

Test: Manual; Treehugger
Bug: 134067115
Change-Id: I2aba48fa87b2de79770a969a9776f539e4a5cf9b