SyncedFoldersActivity: suppress detekt warning

This entire class is legacy and should be refactored

Signed-off-by: Álvaro Brey <alvaro.brey@nextcloud.com>

app/src/main/java/com/owncloud/android/ui/activity/SyncedFoldersActivity.kt

@@ -344,6 +344,7 @@ class SyncedFoldersActivity :
      * @param mediaFolders  the media folders
      * @return the merged list of SyncedFolderItems
      */
+    @Suppress("NestedBlockDepth") // legacy code
     private fun mergeFolderData(
         syncedFolders: List<SyncedFolder>,
         mediaFolders: List<MediaFolder>