title: No implementation found for method pickImage on channel plugins.flutter.io/image_picke
body: <p>I am implementing image_picker in my app. That is not showing any warning or message but when I run it in Android simulator it shows me an error in console: </p>
  
  <pre><code>[ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method pickImage on channel plugins.flutter.io/image_picker)
  E/flutter ( 5074): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:7)
  E/flutter ( 5074): &lt;asynchronous suspension&gt;
  E/flutter ( 5074): #1      ImagePicker.pickImage (package:image_picker/image_picker.dart:53:40)
  E/flutter ( 5074): &lt;asynchronous suspension&gt;
  </code></pre>