title: react-native run-android gives an exception about the PATH connection
body: <p>I am trying to run the react-native run-android command in window 10. I set up the path to the SDK folder using ANDROID_HOME in System Variables of Environment Variables </p>
  
  <pre><code>ANDROID_HOME |  C:\Users\owner\AppData\Local\Android\Sdk
  </code></pre>
  
  <p>And I also set up sdk.dir in the local.properties file </p>
  
  <pre><code>sdk.dir=C\:\\Users\\owner\\AppData\\Local\\Android\\Sdk
  </code></pre>
  
  <p>However, when I run the command lines</p>
  
  <pre><code>react-native run-android 
  </code></pre>
  
  <p>in my project folder C:\Users\owner\Documents\React_Native\MyApplication> It gave me an exception as follow.</p>
  
  <pre><code>C:\Users\owner\Documents\React_Native\MyApplication&gt;react-native run-android
  Scanning folders for symlinks in C:\Users\owner\Documents\React_Native\MyApplication\node_modules (34ms)
  JS server already running.
  
  Building and installing the app on the device (cd android &amp;&amp; gradlew.bat installDebug)...
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  A problem occurred configuring project ':app'.
  &gt; SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
  BUILD FAILED
  
  Total time: 5.305 secs
  Could not install the app on the device, read the error above for details.
  Make sure you have an Android emulator running or a device connected and have
  set up your Android development environment:
  https://facebook.github.io/react-native/docs/android-setup.html
  </code></pre>