Merge pull request #19916 from nextcloud/backport/19888/stable18

[stable18] Get correct mimetype on objectstores

Author: rullzer

lib/private/Files/ObjectStore/ObjectStoreStorage.php

@@ -349,12 +349,7 @@ public function rename($source, $target) {
 
 	public function getMimeType($path) {
 		$path = $this->normalizePath($path);
-		$stat = $this->stat($path);
-		if (is_array($stat)) {
-			return $stat['mimetype'];
-		} else {
-			return false;
-		}
+		return parent::getMimeType($path);
 	}
 
 	public function touch($path, $mtime = null) {