MSIM: Use operator name in Select subscription settings

Change-Id: I1cf537c482285ac76bc4c809433f18cbc8eec9f1
Holoize multi-SIM call target selection dialog.

Change-Id: I3db399422133f90ac15e9b49a217c67fb1f2da94
MSimDialerActivity: actually dial when an option is selected

Right now, all users can do is click cancel

Change-Id: If87b3d6ad47ef81b9e246a7884dcf58e02d9ddf7