[image_picker] swap width and height when source image orientation is left or right

packages/image_picker/ios/Classes/FLTImagePickerImageUtil.m

@@ -76,6 +76,16 @@ + (UIImage *)scaledImage:(UIImage *)image
                                               scale:1
                                         orientation:UIImageOrientationUp];
 
+  // Swap width and height when source image orientation is left/right
+  if ([image imageOrientation] == UIImageOrientationLeft ||
+      [image imageOrientation] == UIImageOrientationRight ||
+      [image imageOrientation] == UIImageOrientationLeftMirrored ||
+      [image imageOrientation] == UIImageOrientationRightMirrored) {
+    double temp = width;
+    width = height;
+    height = temp;
+  }
+
   UIGraphicsBeginImageContextWithOptions(CGSizeMake(width, height), NO, 1.0);
   [imageToScale drawInRect:CGRectMake(0, 0, width, height)];