fix default artifacts to exclude ios and android (#35303)

packages/flutter_tools/lib/src/commands/doctor.dart

@@ -30,6 +30,17 @@ class DoctorCommand extends FlutterCommand {
   @override
   final String description = 'Show information about the installed tooling.';
 
+  @override
+  Future<Set<DevelopmentArtifact>> get requiredArtifacts async {
+    return <DevelopmentArtifact>{
+      DevelopmentArtifact.universal,
+      // This is required because we use gen_snapshot to check if the host
+      // machine can execute the provided artifacts. See `_genSnapshotRuns`
+      // in `doctor.dart`.
+      DevelopmentArtifact.android,
+    };
+  }
+
   @override
   Future<FlutterCommandResult> runCommand() async {
     if (argResults.wasParsed('check-for-remote-artifacts')) {

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -479,12 +479,9 @@ abstract class FlutterCommand extends Command<void> {
 
   /// The set of development artifacts required for this command.
   ///
-  /// Defaults to [DevelopmentArtifact.universal],
-  /// [DevelopmentArtifact.android], and [DevelopmentArtifact.iOS].
+  /// Defaults to [DevelopmentArtifact.universal].
   Future<Set<DevelopmentArtifact>> get requiredArtifacts async => const <DevelopmentArtifact>{
     DevelopmentArtifact.universal,
-    DevelopmentArtifact.iOS,
-    DevelopmentArtifact.android,
   };
 
   /// Subclasses must implement this to execute the command.

packages/flutter_tools/test/commands/install_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/install.dart';
 import 'package:mockito/mockito.dart';
 
@@ -11,6 +12,10 @@ import '../src/mocks.dart';
 
 void main() {
   group('install', () {
+    setUpAll(() {
+      Cache.disableLocking();
+    });
+
     testUsingContext('returns 0 when Android is connected and ready for an install', () async {
       final InstallCommand command = InstallCommand();
       applyMocksToCommand(command);
@@ -21,6 +26,8 @@ void main() {
       testDeviceManager.addDevice(device);
 
       await createTestCommandRunner(command).run(<String>['install']);
+    }, overrides: <Type, Generator>{
+      Cache: () => MockCache(),
     });
 
     testUsingContext('returns 0 when iOS is connected and ready for an install', () async {
@@ -33,6 +40,10 @@ void main() {
       testDeviceManager.addDevice(device);
 
       await createTestCommandRunner(command).run(<String>['install']);
+    }, overrides: <Type, Generator>{
+      Cache: () => MockCache(),
     });
   });
 }
+
+class MockCache extends Mock implements Cache {}