chore: minor changes

Author: xsahil03x

packages/stream_chat_flutter/lib/src/message_input/stream_message_input.dart

@@ -1019,7 +1019,7 @@ class StreamMessageInputState extends State<StreamMessageInput>
       PollCreated() => _onPollCreated(result.poll),
       // Handle/Notify returned errors.
       AttachmentPickerError() => _onAttachmentPickerError(result),
-      _ => () {}, // Ignore other results.
+      _ => Future.value(), // Ignore other results.
     };
   }
 

sample_app/lib/pages/channel_page.dart

@@ -176,11 +176,12 @@ class _ChannelPageState extends State<ChannelPage> {
     Channel channel,
     StreamAttachmentPickerResult result,
   ) {
-    // Notify that the result was not handled.
-    if (result is! LocationPicked) return false;
+    if (result is LocationPicked) {
+      _onShareLocationPicked(channel, result.location).ignore();
+      return true; // Notify that the result was handled.
+    }
 
-    _onShareLocationPicked(channel, result.location).ignore();
-    return true; // Notify that the result was handled.
+    return false; // Notify that the result was not handled.
   }
 
   Future<SendMessageResponse> _onShareLocationPicked(