fix(mobile): use proper context for popping out from share (#5138)

* fix(mobile): use proper context for popping out from share

* mobile: use proper context for popping

---------

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

mobile/lib/modules/album/ui/album_viewer_appbar.dart

@@ -188,7 +188,7 @@ class AlbumViewerAppbar extends HookConsumerWidget
                   gravity: ToastGravity.BOTTOM,
                 );
               }
-              context.pop();
+              buildContext.pop();
             },
           );
           return const ShareDialog();

mobile/lib/modules/asset_viewer/providers/image_viewer_page_state.provider.dart

@@ -68,7 +68,7 @@ class ImageViewerStateNotifier extends StateNotifier<ImageViewerPageState> {
                 gravity: ToastGravity.BOTTOM,
               );
             }
-            context.pop();
+            buildContext.pop();
           },
         );
         return const ShareDialog();

mobile/lib/utils/selection_handlers.dart

@@ -27,7 +27,7 @@ void handleShareAssets(
               gravity: ToastGravity.BOTTOM,
             );
           }
-          context.pop();
+          buildContext.pop();
         },
       );
       return const ShareDialog();