Fix #28120, strong mode allows field overrides

pkg/dev_compiler/test/not_yet_strong_tests.dart

 import 'dart:collection';
 
 /// The set of tests that are not yet strong mode safe.
 final notYetStrongTests = new HashSet<String>.from([
   'language/abstract_exact_selector_test_01_multi',
   'language/abstract_factory_constructor_test_00_multi',
   'language/abstract_getter_test_01_multi',
   'language/abstract_runtime_error_test_01_multi',
   'language/abstract_runtime_error_test_02_multi',
   'language/abstract_runtime_error_test_03_multi',
@@ skipping 2028 matching lines @@
   'corelib/from_environment_const_type_undefined_test_04_multi',
   'corelib/from_environment_const_type_undefined_test_06_multi',
   'corelib/from_environment_const_type_undefined_test_07_multi',
   'corelib/from_environment_const_type_undefined_test_08_multi',
   'corelib/from_environment_const_type_undefined_test_09_multi',
   'corelib/from_environment_const_type_undefined_test_11_multi',
   'corelib/from_environment_const_type_undefined_test_12_multi',
   'corelib/from_environment_const_type_undefined_test_13_multi',
   'corelib/from_environment_const_type_undefined_test_14_multi',
   'corelib/from_environment_const_type_undefined_test_16_multi',
-  'corelib/growable_list_test',
   'corelib/hash_set_type_check_test',
   'corelib/http_resource_test',
   'corelib/int_from_environment3_test_01_multi',
   'corelib/int_from_environment3_test_02_multi',
   'corelib/int_from_environment3_test_03_multi',
   'corelib/int_from_environment3_test_04_multi',
   'corelib/int_from_environment3_test_05_multi',
   'corelib/iterable_element_at_test',
   'corelib/iterable_fold_test',
   'corelib/iterable_mapping_test',
@@ skipping 179 matching lines @@
   'lib/mirrors/reflected_type_classes_test_03_multi',
   'lib/mirrors/reflected_type_test_01_multi',
   'lib/mirrors/reflected_type_test_02_multi',
   'lib/mirrors/reflected_type_test_03_multi',
   'lib/mirrors/regress_16321_test_01_multi',
   'lib/mirrors/regress_19731_test',
   'lib/mirrors/relation_subclass_test',
   'lib/mirrors/removed_api_test',
   'lib/mirrors/repeated_private_anon_mixin_app_test',
   'lib/mirrors/return_type_test',
-  'lib/mirrors/set_field_with_final_inheritance_test',
   'lib/mirrors/static_members_easier_test',
   'lib/mirrors/static_members_test',
   'lib/mirrors/static_test',
   'lib/mirrors/syntax_error_test_01_multi',
   'lib/mirrors/synthetic_accessor_properties_test',
   'lib/mirrors/top_level_accessors_test',
   'lib/mirrors/type_mirror_for_type_test',
   'lib/mirrors/typearguments_mirror_test',
   'lib/mirrors/typedef_in_signature_test',
   'lib/mirrors/typedef_reflected_type_test_01_multi',
@@ skipping 155 matching lines @@
   'lib/html/mutationobserver_test',
   'lib/html/postmessage_structured_test',
   'lib/html/resource_http_test',
   'lib/html/transferables_test',
   'lib/html/webgl_1_test',
   'lib/html/wrapping_collections_test',
   // TODO(jmesserly): these are both under "dart:html" as well.
   'js_test',
   'js_util_test'
 ]);