Disconnect ongoing conference call for emergency

When KEY_ALLOW_HOLD_CALL_DURING_EMERGENCY_BOOL is false, disconnect
any ongoing conference calls before placing a new emergency call.

Bug: 146504210

Change-Id: I93e9cf4da1efa10b7b80cd8da4e12a6e1faa7ed6
Signed-off-by: Sungjae <sung_jae.kim@samsung.com>
1 file changed