Wowoooooow. I got frustrated and pulled my head unit out. Plugged in the Samsung s6 charging cable instead of the pioneer one. Walla, android auto works perfect...... I'm going to try the s4 cable and phone now. If it works, I'm returning the s6.I am going to get the G4 or nexus 6. Change my mind several times a day. Droid turbo keeps creeping in as a possibility too. If it is compatible with AA after lollipop, may move to the top of the list
Can't effing believe it...... it's a pioneer bought usb cable that comes with the android connectivity kit. Who would have thought it would be the issue.