Fix issue where dialed CLIR MMI codes on IMS don't save setting.

This change mirrors what is done in the GsmMmiCode class already and
ensures it is done in the Ims equivalent.

Test: Manually dial *31#, #31# and verify dial includes correct CLIR.
Bug: 77182496
Change-Id: I9faa9cf72cd6dc2e90f48341732870b2e9104f76