MobileSignalController listen to ACTIVE DATA SIM changes

After changing MobileSignalController#updateDataSim to use activeDataSim
instead of defaultDataSim, it should listen to changes in this to
determine whether to updateTelephony.

Test: DSDS QS tile changes when switching data sim
Fixes: 136610544
Change-Id: I91efe837b576e2736058682285723e6487e514e0
1 file changed