Fix Dart linter issue: deprecated_member_use, dead_code, etc

Author: anhappdev

flutter/lib/benchmark/state.dart

@@ -49,6 +49,7 @@ class BenchmarkState extends ChangeNotifier {
 
   // Only if [state] == [BenchmarkStateEnum.downloading]
   String get loadingPath => resourceManager.loadingPath;
+
   double get loadingProgress => resourceManager.loadingProgress;
 
   ExtendedResult? lastResult;
@@ -226,7 +227,6 @@ class BenchmarkState extends ChangeNotifier {
       case true:
         return BenchmarkStateEnum.done;
     }
-    throw StateError('unreachable');
   }
 
   Future<void> resetBenchmarkState() async {

flutter/lib/device_info.dart

@@ -62,7 +62,7 @@ class DeviceInfo {
     String? modelName;
     var machine = deviceInfo.utsname.machine;
     modelName = deviceNames.getSingleNameFromModel(DeviceType.ios, machine);
-      return EnvIos(
+    return EnvIos(
       osVersion: Platform.operatingSystemVersion,
       modelCode: modelCode,
       modelName: modelName,

flutter/lib/ui/history/history_filter_screen.dart

@@ -253,8 +253,8 @@ class DropdownOption<T> {
   DropdownOption(this.value, this.label);
 
   @override
-  bool operator ==(dynamic other) =>
-      other != null && other is DropdownOption && this.value == other.value;
+  bool operator ==(Object other) =>
+      other is DropdownOption && this.value == other.value;
 
   @override
   int get hashCode => value.hashCode ^ label.hashCode;

flutter/lib/ui/home/resource_loading_screen.dart

@@ -44,7 +44,7 @@ class _ResourceLoadingScreenState extends State<ResourceLoadingScreen> {
               fontWeight: FontWeight.bold,
               color: AppColors.lightText,
             ),
-            textScaleFactor: 2,
+            textScaler: const TextScaler.linear(2),
           ),
         ),
       ),

flutter/lib/ui/home/result_circle.dart

@@ -8,8 +8,7 @@ import 'package:mlperfbench/ui/icons.dart' as app_icons;
 class ResultCircle extends StatefulWidget {
   final num _value;
 
-  ResultCircle(num value, {super.key})
-      : _value = value.clamp(0, 1);
+  ResultCircle(num value, {super.key}) : _value = value.clamp(0, 1);
 
   @override
   State<ResultCircle> createState() => _ResultCircleState();

flutter/lib/ui/settings/task_config_section.dart

@@ -131,13 +131,14 @@ class _DataFolderSelectorHelper {
     }
     return ListTile(
       title: Text(l10n.settingsTaskDataFolderCustom),
-      subtitle: WillPopScope(
-        onWillPop: () async {
+      subtitle: PopScope(
+        canPop: false,
+        onPopInvoked: (bool didPop) async {
+          if (didPop) return;
           if (store.customDataFolder.isEmpty ||
               !await Directory(store.customDataFolder).exists()) {
             setValue(DataFolderType.default_);
           }
-          return true;
         },
         child: Column(
           children: [pathField, dirWarning],