example app design update & show active speaker

example/lib/widgets/no_video.dart

@@ -2,6 +2,8 @@ import 'package:eva_icons_flutter/eva_icons_flutter.dart';
 import 'package:flutter/material.dart';
 import 'dart:math' as math;
 
+import 'package:livekit_example/theme.dart';
+
 class NoVideoWidget extends StatelessWidget {
   //
   const NoVideoWidget({Key? key}) : super(key: key);
@@ -12,7 +14,7 @@ class NoVideoWidget extends StatelessWidget {
         child: LayoutBuilder(
           builder: (ctx, constraints) => Icon(
             EvaIcons.videoOffOutline,
-            color: Theme.of(ctx).colorScheme.secondary,
+            color: LKColors.lkBlue,
             size: math.min(constraints.maxHeight, constraints.maxWidth) * 0.3,
           ),
         ),