appium-uiautmator2-server
A netty server that runs on the device listening for commands.
Starting server
build the android project using the commands
gradle clean assembleDebug
gradle clean assembleDebugAndroidTest
push both src and test apks to the device and execute the instrumentation tests.
adb shell am instrument -w io.appium.uiautomator2.test/android.support.test.runner.AndroidJUnitRunner