Add new carrier config to record the default preference setting

Some carriers need to disable the VoNR setting as default, so
introduce new config “vonr_on_by_default_bool” to control this requirement.

Bug: 237621350
Test: manual
Change-Id: Idaa9cfb1739f8261e9a4697eae30b7f4e16241c7
Merged-In: Idaa9cfb1739f8261e9a4697eae30b7f4e16241c7