fix: grey color now can display more obvious

Author: Minessential

app/lib/pages/apk_picker_page.dart

@@ -1,6 +1,7 @@
 import 'package:common/model/file_type.dart';
 import 'package:device_apps/device_apps.dart';
 import 'package:fluent_ui/fluent_ui.dart';
+import 'package:localsend_app/config/theme.dart';
 import 'package:localsend_app/gen/strings.g.dart';
 import 'package:localsend_app/pages/base/base_normal_page.dart';
 import 'package:localsend_app/provider/apk_provider.dart';
@@ -237,7 +238,7 @@ class _ApkPickerPageState extends State<ApkPickerPage> with Refena {
                                             : FluentIcons.checkbox_composite,
                                         color: _selectedApps.contains(app)
                                             ? FluentTheme.of(context).iconTheme.color
-                                            : Colors.grey,
+                                            : FluentTheme.of(context).autoGrey,
                                       )
                                   ],
                                 ),

app/lib/widget/dialogs/favorite_dialog.dart

@@ -1,5 +1,6 @@
 import 'package:common/isolate.dart';
 import 'package:fluent_ui/fluent_ui.dart';
+import 'package:localsend_app/config/theme.dart';
 import 'package:localsend_app/gen/strings.g.dart';
 import 'package:localsend_app/model/persistence/favorite_device.dart';
 import 'package:localsend_app/provider/favorites_provider.dart';
@@ -66,7 +67,7 @@ class _FavoritesDialogState extends State<FavoritesDialog> with Refena {
           if (favorites.isEmpty)
             Text(
               t.dialogs.favoriteDialog.noFavorites,
-              style: const TextStyle(color: Colors.grey),
+              style: TextStyle(color: FluentTheme.of(context).autoGrey),
             ),
           for (final favorite in favorites)
             CardInkWell(

app/lib/widget/list_tile/device_list_tile.dart

@@ -1,5 +1,6 @@
 import 'package:common/model/device.dart';
 import 'package:fluent_ui/fluent_ui.dart';
+import 'package:localsend_app/config/theme.dart';
 import 'package:localsend_app/util/device_type_ext.dart';
 import 'package:localsend_app/util/ip_helper.dart';
 import 'package:localsend_app/widget/custom_progress_bar.dart';
@@ -46,7 +47,7 @@ class DeviceListTile extends StatelessWidget {
         spacing: 10,
         children: [
           if (info != null)
-            Text(info!, style: const TextStyle(color: Colors.grey))
+            Text(info!, style: TextStyle(color: FluentTheme.of(context).autoGrey))
           else if (progress != null)
             Padding(
               padding: const EdgeInsets.symmetric(vertical: 5),