Bug 961938 - [DSDS][MMS] Switching data confirmation message will pop up twice
Revert "Merge pull request #15356 from borjasalguero/dm_update_time_strings"

This reverts commit 78dda57ce4b5e5eb862a370a4fb994d1f0b1c5a3, reversing
changes made to 7c033555f5f79bca85d2a89a9d78fa3dff7dfead.
Merge pull request #15711 from steveck-chung/DSDS-sim_switch_for_MMS

Bug 961938 - [DSDS][MMS] Switching data confirmation message will pop up twice r=julien