title: Calling from not trusted UID
body: <p>When I was running UIAutomator in Android Studio, a crash shows sometimes.</p>
  
  <pre><code> W/ActivityManager: Crash of app com.example.testsample running instrumentation ComponentInfo{com.example.testsample.test/android.support.test.runner.AndroidJUnitRunner}
  07-16 19:19:34.191 7834-7850/? W/Binder: Binder call failed.
  java.lang.SecurityException: Calling from not trusted UID!
      at android.app.UiAutomationConnection.throwIfCalledByNotTrustedUidLocked(UiAutomationConnection.java:427)
      at android.app.UiAutomationConnection.shutdown(UiAutomationConnection.java:324)
      at android.app.IUiAutomationConnection$Stub.onTransact(IUiAutomationConnection.java:209)
      at android.os.Binder.execTransact(Binder.java:570)
  </code></pre>
  
  <p>But it didn't shows every time. I can run successfully when this not showed.
  Can Anyone help me? 
  Thanks.</p>