Move IMS registration state to SIM status screen

Manually merge change I3aff03ebdc9dc165db66c5007a2fa987ab8cd822 due
to merge conflicts.

To show IMS registration state for each SIM, move the preference of
IMS registration state from Status screen to SIM Status screen.

Fixes: 66063299
Test: manual - Checked that the IMS registration state is displayed on
the SIM Status screen.
Test: make RunSettingsRoboTests

Change-Id: Ic0713c357085d94b59605c1b924e7b56a362e256