Let network scan timer to be started when VoLTE setting is disabled.

With old implementation, the scan timer will be started only when
VoLTE emergency is supported and VoLte setting is enabled.

Bug: 243878608
Test: atest EmergencyCallDomainSelectorTest
Change-Id: Ib103ce44e20c54a6104fe9600770e482716b7442
2 files changed