Resolve #3521918 "Imagecropapieffect is deprecated"

Closes #3521918

src/Plugin/AimImageEffect/ImageCropApiEffect.php

@@ -27,6 +27,13 @@ class ImageCropApiEffect extends AimImageEffectBase {
    */
   protected $logger;
 
+    /**
+     * Crop entity.
+     *
+     * @var \Drupal\crop\CropInterface|false
+     */
+  protected $crop;
+
   /**
    * Crop type entity storage.
    *