title: How to make the status bar translucent when using react-navigation on Android?
body: <p>I'm using latest react-native(0.45.1) and react-navigation(1.0.0-beta.11).
  Because using react-navigation, i can't use ReactNative.StatusBar, so I don't know how to make the status bar translucent.
  Maybe effective both on Android and iOS, THX!</p>