String changes for some SIM switch confirmation dialogs

These are changes for strings used in two scenarios:

-When switching which SIM is used for mobile data. This is an update to
 some existing strings.

-Enabling an eSIM when another one is already enabled (so the first one
 will need to be disabled). These are new strings.

Bug: 129156640
Test: compile, plus manual (run a device in DSDS mode, go to details for
SIM that isn't currently used for mobile data, and tap on mobile data
switch)

Change-Id: Ie9dfe23c466cb454bbad916ba83b833967a0da0e