Fix inability to reject call as secondary user from lock screen.

The rejectCall method in InCallAdapter was performing a check to see if
reply via sms is allowed, however it was doing this outside of the
"clearCallingIdentity" block.  This was causing a crash when trying to
determine if the device is locked.

Test: Reject call as primary user from lock screen.
Test: Reject call as secondary user from lock screen.
Bug: 78463911
Change-Id: Icff65eb059ff96d716b2adb2eacffcd6e41a5a40