title: Changing the package name in a react-native app
body: <p>I've created an app in react-native. I need the package name to be:
  com.org.appname</p>
  
  <p>React-native does not allow you to specify this as the package name in the init, or to change it after init.</p>
  
  <pre><code>react-native init --package="com.org.appname" 
  </code></pre>
  
  <p>does not work</p>
  
  <p>Changing the package name as described in <a href="https://stackoverflow.com/questions/37389905/change-package-name-for-android-in-react-native">Change package name for Android in React Native</a> also doesn't work and results in the following error on react-native run-android</p>
  
  <p>Failed to finalize session : INSTALL_FAILED_VERSION_DOWNGRADE</p>