fix(ui, core): use CircularProgressIndicator.adaptive instead of material indicator.

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat_flutter_core/lib/src/message_list_core.dart

@@ -41,7 +41,7 @@ bool Function(Message) defaultMessageFilter(String currentUserId) =>
 ///         },
 ///         loadingBuilder: (context) {
 ///           return Center(
-///             child: CircularProgressIndicator(),
+///             child: CircularProgressIndicator.adaptive(),
 ///           );
 ///         },
 ///         messageListBuilder: (context, list) {

packages/stream_chat_flutter_core/lib/src/stream_channel.dart

@@ -445,7 +445,7 @@ class StreamChannelState extends State<StreamChannel> {
         final dataLoaded = snapshot.data?.every((it) => it) == true;
         if (widget.showLoading && !dataLoaded) {
           return const Center(
-            child: CircularProgressIndicator(),
+            child: CircularProgressIndicator.adaptive(),
           );
         }
         return widget.child;