Further cleanups to annotation elements now that #25706 is fixed.

pkg/analyzer/lib/src/dart/ast/ast.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 analyzer.src.dart.ast.ast;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/syntactic_entity.dart';
@@ skipping 265 matching lines @@
 
   @override
   void set constructorName(SimpleIdentifier name) {
     _constructorName = _becomeParentOf(name as AstNodeImpl);
   }
 
   @override
   Element get element {
     if (_element != null) {
       return _element;
-    } else if (_name != null) {
+    } else if (_constructorName == null && _name != null) {
       return _name.staticElement;
     }
     return null;
   }
 
   @override
   void set element(Element element) {
     _element = element;
   }
 
@@ skipping 10830 matching lines @@
 
   @override
   dynamic/*=E*/ accept/*<E>*/(AstVisitor/*<E>*/ visitor) =>
       visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _expression?.accept(visitor);
   }
 }