Add support to search by uploader name

mobile/lib/models/search/search_types.dart

@@ -26,6 +26,7 @@ import "package:photos/utils/share_util.dart";
 enum ResultType {
   collection,
   file,
+  uploader,
   location,
   locationSuggestion,
   month,

mobile/lib/services/search_service.dart

@@ -551,6 +551,7 @@ class SearchService {
     final List<EnteFile> allFiles = await getAllFilesForSearch();
     final List<EnteFile> captionMatch = <EnteFile>[];
     final List<EnteFile> displayNameMatch = <EnteFile>[];
+    final List<EnteFile> uploaderNameMatch = <EnteFile>[];
     for (EnteFile eachFile in allFiles) {
       if (eachFile.caption != null && pattern.hasMatch(eachFile.caption!)) {
         captionMatch.add(eachFile);
@@ -558,6 +559,10 @@ class SearchService {
       if (pattern.hasMatch(eachFile.displayName)) {
         displayNameMatch.add(eachFile);
       }
+      if (eachFile.uploaderName != null &&
+          pattern.hasMatch(eachFile.uploaderName!)) {
+        uploaderNameMatch.add(eachFile);
+      }
     }
     if (captionMatch.isNotEmpty) {
       searchResults.add(
@@ -590,6 +595,21 @@ class SearchService {
         ),
       );
     }
+    if (uploaderNameMatch.isNotEmpty) {
+      searchResults.add(
+        GenericSearchResult(
+          ResultType.uploader,
+          query,
+          uploaderNameMatch,
+          hierarchicalSearchFilter: TopLevelGenericFilter(
+            filterName: query,
+            occurrence: kMostRelevantFilter,
+            filterResultType: ResultType.uploader,
+            matchedUploadedIDs: filesToUploadedFileIDs(uploaderNameMatch),
+          ),
+        ),
+      );
+    }
     return searchResults;
   }