More target split fixes (#1495)
Avoid importing `test_api/test_api.dart` from `test_core` except in
`test_core.dart` which re-exports it. This allows a separate
`test_core:scaffolding` target with limited transitive dependencies.
Add back `test_api/lib/src/remote_listener.dart` to reduce churn.
diff --git a/pkgs/test_api/lib/src/remote_listener.dart b/pkgs/test_api/lib/src/remote_listener.dart
new file mode 100644
index 0000000..f2df134
--- /dev/null
+++ b/pkgs/test_api/lib/src/remote_listener.dart
@@ -0,0 +1,5 @@
+// Copyright (c) 2021, 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.
+
+export 'backend/remote_listener.dart' show RemoteListener;
diff --git a/pkgs/test_core/lib/src/runner/load_suite.dart b/pkgs/test_core/lib/src/runner/load_suite.dart
index adc0cae..15dbf18 100644
--- a/pkgs/test_core/lib/src/runner/load_suite.dart
+++ b/pkgs/test_core/lib/src/runner/load_suite.dart
@@ -14,7 +14,7 @@
import 'package:test_api/src/backend/suite_platform.dart'; // ignore: implementation_imports
import 'package:test_api/src/backend/test.dart'; // ignore: implementation_imports
// ignore: deprecated_member_use
-import 'package:test_api/test_api.dart' show Timeout;
+import 'package:test_api/scaffolding.dart' show Timeout;
import '../util/async.dart';
import '../util/io_stub.dart' if (dart.library.io) '../util/io.dart';
