7 files declare their use of StreamWrapperManagerInterface in Zircon Profile 8

EntityFile.php in core/modules/file/src/Plugin/migrate/destination/EntityFile.php

Contains \Drupal\file\Plugin\migrate\destination\EntityFile.

FileSystem.php in core/lib/Drupal/Core/File/FileSystem.php

Contains \Drupal\Core\File\FileSystem.

FileSystemForm.php in core/modules/system/src/Form/FileSystemForm.php

Contains \Drupal\system\Form\FileSystemForm.

GDToolkit.php in core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php

Contains \Drupal\system\Plugin\ImageToolkit\GDToolkit.

ImageStyleRoutes.php in core/modules/image/src/Routing/ImageStyleRoutes.php

Contains \Drupal\image\Routing\ImageStyleRoutes.

MimeTypeGuesser.php in core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php

Contains \Drupal\Core\File\MimeType\MimeTypeGuesser.

PathProcessorImageStyles.php in core/modules/image/src/PathProcessor/PathProcessorImageStyles.php

Contains \Drupal\image\PathProcessor\PathProcessorImageStyles.