title: Unable to list target platforms. ArCore with Unity
body: <p>I'm trying to use Unity 2017.2.0b10 to check Google ArCore, but when I try  to Build the project I'm getting this Error:</p>
  
  <pre><code>CommandInvokationFailure: Unable to list target platforms. Please make sure the android sdk path is correct. See the Console for more details. 
  C:/Program Files/Java/jdk1.8.0_144\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="E:/AndroidSDK/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity 2017.2.0b10\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
  
  stderr[
  Error:Invalid command android
  ]
  stdout[
  
  ]
  exit code: 64
  </code></pre>
  
  <p>If anyone has any idea please let me know.</p>