title: Flutter Camera Preview not rotating with phone orientation
body: <p>I'm new to Dart/Flutter and currently using the Flutter <a href="https://github.com/flutter/plugins/tree/master/packages/camera" rel="noreferrer">Camera Plugin</a> but I am running into a problem with the CameraPreview for when the phone turns to landscape mode.  The images stay vertical and don't rotate the 90degrees with the phone.</p>
  
  <p>I have tried countless things including Transform.rotate(), but I can't seem to get the image to both, fill the screen and rotate 90degrees.</p>
  
  <p>The pictures that were taken while the phone was sideways still saved in the correct orientation when I view them, but using the _cameraPreviewWidget.</p>
  
  <p><a href="https://i.stack.imgur.com/nsAab.jpg" rel="noreferrer">Normal</a></p>
  
  <p><a href="https://i.stack.imgur.com/qN0YE.png" rel="noreferrer">Landscape</a></p>