[DO NOT MERGE] Grant fixed SMS & Phone permission to package handling the twinning

settings intent.

This change was never merged down from cw-e-dev to nyc-dev (there were a
merge conflict that was skipped to quickly unblock nyc-dev since this
change isn't needed for phone)

Original CL: ag/874613

The test part of this CL is already merged down to nyc (see ag/874315).

BUG: 27343350
Change-Id: I818424e94006910dc25bab7cccb24f7979c39c9e