title: Google map in flutter doesn't appear
body: <p>I'm trying to follow this tutorial "<a href="https://medium.com/flutter-io/google-maps-and-flutter-cfb330f9a245" rel="noreferrer">https://medium.com/flutter-io/google-maps-and-flutter-cfb330f9a245</a>"  to add google map in flutter.
  I updated android manifest with google map key and added a permission for accessing fine_location.I get white screen on my emulator with no map.
  i spent many hours trying to fix it but in vain . i also tried the sample usage with plugin "<a href="https://pub.dartlang.org/packages/google_maps_flutter#-readme-tab-" rel="noreferrer">https://pub.dartlang.org/packages/google_maps_flutter#-readme-tab-</a>" but nothing help in showing map . any help is appreciated thanks in advance</p>