Adjust experimental/federated_plugin/federated_plugin lint rules (#817)

experimental/federated_plugin/federated_plugin/analysis_options.yaml

@@ -17,4 +17,3 @@ linter:
     test_types_in_equals: true
     throw_in_finally: true
     unnecessary_statements: true
-    use_key_in_widget_constructors: false

experimental/federated_plugin/federated_plugin/example/analysis_option.yaml

@@ -1,4 +1,4 @@
-include: package:pedantic/analysis_options.1.11.0.yaml
+include: package:flutter_lints/flutter.yaml
 
 analyzer:
   strong-mode:
@@ -7,25 +7,13 @@ analyzer:
 
 linter:
   rules:
-    - avoid_types_on_closure_parameters
-    - avoid_void_async
-    - await_only_futures
-    - camel_case_types
-    - cancel_subscriptions
-    - close_sinks
-    - constant_identifier_names
-    - control_flow_in_finally
-    - directives_ordering
-    - empty_statements
-    - hash_and_equals
-    - implementation_imports
-    - non_constant_identifier_names
-    - package_api_docs
-    - package_names
-    - package_prefixed_library_names
-    - test_types_in_equals
-    - throw_in_finally
-    - unnecessary_brace_in_string_interps
-    - unnecessary_getters_setters
-    - unnecessary_new
-    - unnecessary_statements
+    avoid_types_on_closure_parameters: true
+    avoid_void_async: true
+    cancel_subscriptions: true
+    close_sinks: true
+    directives_ordering: true
+    package_api_docs: true
+    package_prefixed_library_names: true
+    test_types_in_equals: true
+    throw_in_finally: true
+    unnecessary_statements: true

experimental/federated_plugin/federated_plugin/example/lib/main.dart

@@ -7,13 +7,15 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
 void main() {
-  runApp(MyApp());
+  runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: HomePage(),
     );
   }
@@ -22,6 +24,8 @@ class MyApp extends StatelessWidget {
 /// Demonstrates how to use the getBatteryLevel method from federated_plugin to retrieve
 /// current battery level of device.
 class HomePage extends StatefulWidget {
+  const HomePage({Key? key}) : super(key: key);
+
   @override
   _HomePageState createState() => _HomePageState();
 }

experimental/federated_plugin/federated_plugin/example/test/widget_test.dart

@@ -19,7 +19,7 @@ void main() {
     });
 
     testWidgets('get current battery level from platform', (tester) async {
-      await tester.pumpWidget(MyApp());
+      await tester.pumpWidget(const MyApp());
 
       // Tap button to retrieve current battery level from platform.
       await tester.tap(find.byType(ElevatedButton));