title: Trying to embed a platform view but the PaintContext does not support embedding
body: <p>I'm trying to add google maps to my project ,but the map is self is not 
  showing on ios simulator </p>
  
  <p>here is what I get when running the widget</p>
  
  <pre><code>[VERBOSE-2:platform_view_layer.cc(38)] Trying to embed a platform view but the PaintContext does not support embedding
  Google Maps SDK for iOS version: 3.4.0.0
      [C1.1 3DBF24C4-522B-4596-B9CD-9F9A538547E8 172.20.10.4:51304&lt;-&gt;172.217.22.110:443]
      Connected Path: satisfied (Path is satisfied), interface: en0
      Duration: 0.791s, DNS @0.009s took 0.078s, TCP @0.091s took 0.163s, TLS took 0.337s
      bytes in/out: 4277/672, packets in/out: 9/8, rtt: 0.155s, retransmitted packets: 0, out-of-order packets: 0
  </code></pre>
  
  <p>I have tried to to add  </p>
  
  <pre><code>&lt;key&gt;io.flutter.embedded_views_preview&lt;/key&gt;
      &lt;true/&gt;
  </code></pre>
  
  <p>to info.plist , </p>
  
  <p>also update the map SDK to the latest version </p>
  
  <p>here's my code </p>
  
  <pre><code> static const LatLng _center = const LatLng(45.521563, -122.677433);
  
    void _onMapCreated(GoogleMapController controller) {
      _controller.complete(controller);
    }
  
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text('Maps Sample App'),
            backgroundColor: Colors.green[700],
          ),
          body: GoogleMap(
            onMapCreated: _onMapCreated,
            initialCameraPosition: CameraPosition(
              target: _center,
              zoom: 11.0,
            ),
          ),
        ),
      );
    }
  </code></pre>