MSim Settings: Update UI/UX with user friendly...

…strings

Hide TuneAway and Priority subscription preferences unless
  config_HasTuneAway is set to true in device overlay.

  This conditionally reverts cea415d
  as some device RILs don't support it.

Change-Id: I453f0833d80e17f7249d3b7c23fb2cc73ebd4c32