Default bluetooth map

Im looking for a rom for droid dna that supports bluetooth map. This feature will let me see text messages in my car and currently the roms im trying are not working. I read in several places that this feature was placed into the version 4.4 of android. Can anyone give me advice or a current rom for the dna that can help? Even if its something I can install to a rom thats current would be great too. Thanks for the help in advance.