title: Android Instrumentation Test without target-package
body: <p>I have a android library that dependence on logcat.</p>
  
  <p>I want to have an instrumentation test for this library.</p>
  
  <p>However, the instrumentation require me to specify a target-apk to instrument. But, I don't need/have one.</p>
  
  <p>So, what is the proper way to write test in this case?</p>