deps(mobile): flutter 3.16 (#6677)

* dep(mobile): update flutter and deps

* chore: dart analyzer

* chore: update flutter workflow version

* chore: dart format

* fix: gallery_viewer PopScope

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/modules/backup/services/backup.service.dart

@@ -429,10 +429,10 @@ class BackupService {
 class MultipartRequest extends http.MultipartRequest {
   /// Creates a new [MultipartRequest].
   MultipartRequest(
-    String method,
-    Uri url, {
+    super.method,
+    super.url, {
     required this.onProgress,
-  }) : super(method, url);
+  });
 
   final void Function(int bytes, int totalBytes) onProgress;