(#4641) We shall also set the C flag in the packet header, this will be used for...

[todo]

connectedhomeip/src/messaging/MessageCounterSync.cpp

Lines 126 to 136 in 2428bc8

	// TODO:(#4641) We shall also set the C flag in the packet header, this will be used for message protection later.
	sendFlags.Set(Messaging::SendMessageFlags::kNoAutoRequestAck, true).Set(Messaging::SendMessageFlags::kExpectResponse, true);
	// Arm a timer to enforce that a MsgCounterSyncRsp is received before kMsgCounterSyncTimeout.
	exchangeContext->SetResponseTimeout(kMsgCounterSyncTimeout);
	// Send the message counter synchronization request in a Secure Channel Protocol::MsgCounterSyncReq message.
	err = exchangeContext->SendMessage(Protocols::SecureChannel::MsgType::MsgCounterSyncReq, std::move(msgBuf), sendFlags);
	SuccessOrExit(err);
	exit:

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This issue was generated by todo based on a TODO comment in 2428bc8 when #4712 was merged. cc @yufengwangca.