For now Android Auto only can be install on our phone via unofficial way -> APK side load or geo-location playstore.
C27 is a CKD, not CBU
some CBU supported Android Auto as it's imported directly from overseas. the HU already using the firmware of the origin country that already has the support for Android Auto.
On the side note, the Clarion HU on C27 might not be having problem, but I suspect the "inherent" problem of it auto restarts during engine auto start/off lies with the wiring of the HU to the C27
as there are owner found out the power of the HU are drawn from the wiper instead of the ACC, and according to the simple survey in the C27 owner group, more than half of the C27 owner experience it, me included.
Some owners disable the auto start/off feature, and they may never encounter such issue, so the total number of cases could be higher.
So I can safely categorize it as an "inherent" problem, and TC Nissan need to solve it among other issues as well.
On Android Auto, cars I know of without having to unofficially unlocking it, Mazda CX5 and Ford Ranger