[Settings] Initial config UI support for cross sim calling

This is the initial configuration UI support for cross SIM calling.

Mock UI: https://docs.google.com/presentation/d/1u9eO9Fs2_kr1mqkzyVe-_iNldM6OBv4ucmhUTr3Z-0w/edit?resourcekey=0-siV3RVBkI_fjH8mMWHbtHg#slide=id.gb4a3581a82_0_0
Screenshot: https://screenshot.googleplex.com/3QX3Y6vAhBYv7LC

Bug: 174012397
Test: manual
Change-Id: Id96b72054bee9b3359e5336cc90acbff7e6d78ea