feat(llc): improve message validation for upload criteria

Author: xsahil03x

packages/stream_chat/lib/src/client/channel.dart

@@ -651,11 +651,21 @@ class Channel {
 
   bool _isMessageValidForUpload(Message message) {
     final hasText = message.text?.trim().isNotEmpty == true;
+    if (hasText) return true;
+
     final hasAttachments = message.attachments.isNotEmpty;
+    if (hasAttachments) return true;
+
     final hasQuotedMessage = message.quotedMessageId != null;
+    if (hasQuotedMessage) return true;
+
+    final hasSharedLocation = message.sharedLocation != null;
+    if (hasSharedLocation) return true;
+
     final hasPoll = message.pollId != null;
+    if (hasPoll) return true;
 
-    return hasText || hasAttachments || hasQuotedMessage || hasPoll;
+    return false;
   }
 
   final _sendMessageLock = Lock();