I downloaded the Controller Emulator from the Gvr github page, but I cant install it on my Sony Xperia Z3 compact (API=22).
The installation over adb fails with this message: Failure [INSTALL_FAILED_NO_MATCHING_ABIS].
Do I need Android 6.0 or even N to install the app?
I was planning to run my app on an emulator running Android N and control it with my phone until an actual devkit comes out.
I was able to successfully install the controller_emulator.apk using Android 4.4 on my Droid X, so Android 6.0 shouldn't be required (although I installed a CM11 ROM in order to upgrade to Android 4). Also, for hardware prerequisites, Google only states that you need
A second Android phone, running KitKat or above. These instructions were tested using a Nexus 5X.
But, it seems that the native binaries for the controller app might not be supported on the Z3 according to the error you are getting, as discussed here on stackoverflow.
There was a bug fix directed toward this exact issue. You could also try updating to the latest controller emulator app. https://github.com/googlevr/gvr-android-sdk/issues/88