external exceptions usage replaced with the wrapped

Author: akaplya

app/code/Magento/Catalog/Block/Adminhtml/Product/Helper/Form/Gallery/Content.php

@@ -14,7 +14,7 @@
 namespace Magento\Catalog\Block\Adminhtml\Product\Helper\Form\Gallery;
 
 use Magento\Backend\Block\DataProviders\ImageUploadConfig as ImageUploadConfigDataProvider;
-use League\Flysystem\FileNotFoundException;
+use Magento\Framework\Storage\FileNotFoundException;
 use Magento\Framework\App\ObjectManager;
 use Magento\Backend\Block\Media\Uploader;
 use Magento\Framework\Storage\StorageProvider;

app/code/Magento/Catalog/Block/Product/Gallery.php

@@ -11,7 +11,7 @@
  */
 namespace Magento\Catalog\Block\Product;
 
-use League\Flysystem\FileNotFoundException;
+use Magento\Framework\Storage\FileNotFoundException;
 use Magento\Catalog\Model\Product;
 use Magento\Catalog\Model\Product\Media\Config;
 use Magento\Framework\App\ObjectManager;