organize imports

Author: szakarias

app/test/service/download_counts/compute_total_download_counts_test.dart

@@ -5,13 +5,13 @@ import 'dart:convert';
 
 import 'package:basics/basics.dart';
 import 'package:gcloud/storage.dart';
+import 'package:pub_dev/fake/backend/fake_download_counts.dart';
 import 'package:pub_dev/service/download_counts/backend.dart';
 import 'package:pub_dev/service/download_counts/compute_30_days_total_counts.dart';
 import 'package:pub_dev/shared/configuration.dart';
 import 'package:test/test.dart';
 
 import '../../shared/test_services.dart';
-import '../../../lib/fake/backend/fake_download_counts.dart';
 
 void main() {
   group('', () {