LivoxProto1: Cancel async contin branch cbs in oracle fn

We were canceling the registered handler CBs in their branch
segments instead of in the unifying oracle fn.
This caused a bug where handlers were left behind in the
udpCmdDemuxer and thus a handler was invoked twice when a UDP
msg came in.

commonLibs/livoxProto1/device.cpp

@@ -625,16 +625,12 @@ private:
 		}
 	}
 
-		// This is called from the UDP command handler
 	void executeHandshakeReq1_2(
 		std::shared_ptr<ExecuteHandshakeReq> context,
 		const uint8_t* data, ssize_t bytesReceived,
 		const struct sockaddr_in& senderAddr
 	)
 	{
-		// Unregister the handler to decrement refcount
-		device.unregisterUdpCommandHandler(0x00, 0x01, context->deviceIP);
-
 		// Store the received data
 		context->bytesReceived = bytesReceived;
 		context->senderAddr = senderAddr;
@@ -661,13 +657,14 @@ private:
 		// Ensure we only execute once using atomic exchange
 		if (handlerExecuted.exchange(true) == true) { return; }
 
+		// Cancel timer if still running
+		timeoutTimer.cancel();
+		device.unregisterUdpCommandHandler(0x00, 0x01, deviceIP);
+
 		// Examine the flags and decide what happened
 		SocketState finalSocketState = socketState.load();
 		bool finalTimerFired = timerFired.load();
 
-		// Cancel timer if still running
-		timeoutTimer.cancel();
-
 		// Check for timeout only if there was no socket activity
 		if (finalTimerFired
 			&& finalSocketState == SocketState::SOCKET_STILL_WAITING)
@@ -1373,10 +1370,6 @@ protected:
 		const struct sockaddr_in& senderAddr
 	)
 	{
-		// Unregister the handler to decrement refcount
-		device.unregisterUdpCommandHandler(
-			0x00, 0x04, device.discoveredDevice.ipAddr);
-
 		// Store the received data
 		context->bytesReceived = bytesReceived;
 		context->senderAddr = senderAddr;
@@ -1405,11 +1398,13 @@ protected:
 		// Only execute once
 		if (context->handlerExecuted.exchange(true)) { return; }
 
+		context->timeoutTimer.cancel();
+		device.unregisterUdpCommandHandler(
+			0x00, 0x04, device.discoveredDevice.ipAddr);
+
 		SocketState finalSocketState = context->socketState.load();
 		bool finalTimerFired = context->timerFired.load();
 
-		context->timeoutTimer.cancel();
-
 		if (finalTimerFired &&
 		    finalSocketState == SocketState::SOCKET_STILL_WAITING)
 		{