[mob][photos] Make matchedUploadedIDs a property of HierarchicalSearchFilter so that it's a property of all filters that extend it

mobile/lib/models/search/hierarchical/album_filter.dart

@@ -8,7 +8,6 @@ class AlbumFilter extends HierarchicalSearchFilter {
 
   ///Number of files in the gallery that are from [collectionID]
   final int occurrence;
-  final Set<int> matchedUploadedIDs = {};
 
   AlbumFilter({
     required this.collectionID,

mobile/lib/models/search/hierarchical/hierarchical_search_filter.dart

@@ -5,6 +5,8 @@ int kMostRelevantFilter = 10000;
 int kLeastRelevantFilter = -1;
 
 abstract class HierarchicalSearchFilter {
+  final Set<int> matchedUploadedIDs = {};
+
   String name();
   IconData? icon();
   int relevance();

mobile/lib/utils/hierarchical_search_util.dart

@@ -21,7 +21,7 @@ Future<List<EnteFile>> getFilteredFiles(
         }
       } else {
         if (filter.isMatch(file)) {
-          filteredFiles.add(file);
+          filter.matchedUploadedIDs.add(file.uploadedFileID!);
         }
       }
     }