Greetings All!
Just installed a Pioneer AVH-4100NEX. I've got Android Auto installed, and it seems to work with my T-Mobile Note 4, but I have a couple of questions/problems.
1) Pandora is supposed to work with AA, but when I access music, my only options are Amazon Music and Google Music. Pandora is installed on my phone and it streams fine with bluetooth, so how do I get AA to see it? When I touch the apps button, that displays all possible connections, Pandora is there, but it's grayed out.
On a side note, Amazon Music says I have no playlists, which is not correct, as I've linked to a number of Amazon created playlists.
2) Is it possible to use AA to access music stored on my phone? I've got a bunch of songs/playlists on my phone, but I haven't been able to figure out how to access them using AA.
At this point, I can either play music using Bluetooth (stream Pandora or play music from phone) or use AA for navigation, but I can't seem to get nav plus music, which is what I bought the head unit for. 
The 4100 is running 1.03 firmware, my Note 4 is running 5.0.1. I've been reluctant to upgrade the 4100 firmware to 1.05, due to reading about issues people have had with the install and it causing Bluetooth problems.
FWIW, I have cables for both AA (straight USB) and MirrorLink (using the Samsung HDMI/USB dongle) as well as the 3.5 mm aux cable connected.
Thank you for any help and suggestions.
G