Issue 29303. Prefer import updates and SDK imports over other imports.

pkg/analysis_server/lib/src/services/correction/fix.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 analysis_server.src.services.correction.fix;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
@@ skipping 159 matching lines @@
       'CREATE_NO_SUCH_METHOD', 51, "Create 'noSuchMethod' method");
   static const IMPORT_LIBRARY_PREFIX = const FixKind('IMPORT_LIBRARY_PREFIX',
       51, "Use imported library '{0}' with prefix '{1}'");
   static const IMPORT_LIBRARY_PROJECT1 =
       const FixKind('IMPORT_LIBRARY_PROJECT1', 47, "Import library '{0}'");
   static const IMPORT_LIBRARY_PROJECT2 =
       const FixKind('IMPORT_LIBRARY_PROJECT2', 48, "Import library '{0}'");
   static const IMPORT_LIBRARY_PROJECT3 =
       const FixKind('IMPORT_LIBRARY_PROJECT3', 49, "Import library '{0}'");
   static const IMPORT_LIBRARY_SDK =
-      const FixKind('IMPORT_LIBRARY_SDK', 49, "Import library '{0}'");
+      const FixKind('IMPORT_LIBRARY_SDK', 46, "Import library '{0}'");
   static const IMPORT_LIBRARY_SHOW =
-      const FixKind('IMPORT_LIBRARY_SHOW', 49, "Update library '{0}' import");
+      const FixKind('IMPORT_LIBRARY_SHOW', 45, "Update library '{0}' import");
   static const INSERT_SEMICOLON =
       const FixKind('INSERT_SEMICOLON', 50, "Insert ';'");
   static const LINT_ADD_OVERRIDE =
       const FixKind('LINT_ADD_OVERRIDE', 50, "Add '@override' annotation");
   static const LINT_REMOVE_INTERPOLATION_BRACES = const FixKind(
       'LINT_REMOVE_INTERPOLATION_BRACES',
       50,
       'Remove unnecessary interpolation braces');
   static const MAKE_CLASS_ABSTRACT =
       const FixKind('MAKE_CLASS_ABSTRACT', 50, "Make class '{0}' abstract");
@@ skipping 53 matching lines @@
   @override
   final AnalysisError error;
 
   FixContextImpl(this.resourceProvider, this.analysisContext, this.error);
 
   FixContextImpl.from(FixContext other)
       : resourceProvider = other.resourceProvider,
         analysisContext = other.analysisContext,
         error = other.error;
 }