Extract analysis/notifications into a separate operation/file.

pkg/analysis_server/test/operation/operation_queue_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.operation.queue;
 
 import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_queue.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
 
 main() {
   groupSep = ' | ';
 
   group('ServerOperationQueue', () {
@@ skipping 95 matching lines @@
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 class ServerOperationMock extends TypedMock implements ServerOperation {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 class AnalysisServerMock extends TypedMock implements AnalysisServer {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }