Update to adhere to the new face-search API

lib/face_search_manager.dart

@@ -29,7 +29,8 @@ class FaceSearchManager {
   }
 
   Future<List<File>> getFaceSearchResults(
-      Face face, int sinceTime, int limit) async {
+      Face face, int beforeCreationTime, int limit) async {
+    _logger.info("Fetching since creation " + beforeCreationTime.toString());
     final result = await _dio
         .get(
       Configuration.instance.getHttpEndpoint() +
@@ -37,7 +38,7 @@ class FaceSearchManager {
           face.faceID.toString(),
       queryParameters: {
         "limit": limit,
-        "sinceTime": sinceTime,
+        "beforeCreationTime": beforeCreationTime,
       },
       options:
           Options(headers: {"X-Auth-Token": Configuration.instance.getToken()}),

lib/ui/face_search_results_page.dart

@@ -15,9 +15,12 @@ class FaceSearchResultsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     var gallery = Gallery(
-      asyncLoader: (sinceFile, limit) =>
-          _faceSearchManager.getFaceSearchResults(
-              face, sinceFile == null ? 0 : sinceFile.updationTime, limit),
+      asyncLoader: (lastFile, limit) => _faceSearchManager.getFaceSearchResults(
+          face,
+          lastFile == null
+              ? DateTime.now().microsecondsSinceEpoch
+              : lastFile.creationTime,
+          limit),
       tagPrefix: "face_search_results",
       selectedFiles: selectedFiles,
     );

lib/ui/gallery.dart

@@ -16,7 +16,7 @@ import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 class Gallery extends StatefulWidget {
   final List<File> Function() syncLoader;
-  final Future<List<File>> Function(File file, int limit) asyncLoader;
+  final Future<List<File>> Function(File lastFile, int limit) asyncLoader;
   // TODO: Verify why the event is necessary when calling loader post onRefresh
   // should have done the job.
   final Stream<Event> reloadEvent;
@@ -40,7 +40,7 @@ class Gallery extends StatefulWidget {
 }
 
 class _GalleryState extends State<Gallery> {
-  static final int kLoadLimit = 100;
+  static final int kLoadLimit = 200;
   static final int kEagerLoadTrigger = 10;
 
   final Logger _logger = Logger("Gallery");

lib/ui/remote_folder_page.dart

@@ -21,9 +21,9 @@ class _RemoteFolderPageState extends State<RemoteFolderPage> {
   @override
   Widget build(Object context) {
     var gallery = Gallery(
-      asyncLoader: (sinceFile, limit) => FileDB.instance.getAllInFolder(
+      asyncLoader: (lastFile, limit) => FileDB.instance.getAllInFolder(
           widget.folder.id,
-          sinceFile == null ? 0 : sinceFile.updationTime,
+          lastFile == null ? 0 : lastFile.updationTime,
           limit),
       onRefresh: () => FolderSharingService.instance.syncDiff(widget.folder),
       tagPrefix: "remote_folder",