Android APK vs test APK?
app-dev-debug is your app, the debug build. app-dev-debug-androidTest is the apk for your android instrumentation tests. They have to run on an Android device, so they need to be in an apk.
app-dev-debug is your app, the debug build. app-dev-debug-androidTest is the apk for your android instrumentation tests. They have to run on an Android device, so they need to be in an apk.