Well the problem with trying a third party MirrorLink app is that I don't believe one was ever made, because each vendor was putting their own special sauce into the application to make it work. That's why when getting Samsung DrinkLink and Nokia's Car Mode with Mirrorlink, you always went to the individual vendor's app store rather than Google Play in general. This may have changed more recently, but that's how it was in the days of the Galaxy S3 generation.
Device I used at that time was a Sony XAV-601BT
I haven't fooled with Sony's specific MirrorLink implementation yet. They were a little bit later to the party than Samsung and Nokia.