livoxGen1: call PcloudStimulusBuffer::start/stop

We now call start()/stop() in attach/detachDeviceReq.

stimBuffApis/livoxGen1/livoxGen1.cpp

@@ -213,6 +213,8 @@ public:
 		context->deviceTmp->nAttachedStimBuffs++;
 		attachedStimBuffs.push_back(pcloudStimBuff);
 
+		pcloudStimBuff->start();
+
 		if (1 || OptionParser::getOptions().verbose)
 		{
 			std::cout << __func__ << ": Got return mode (" << (int)mode
@@ -345,6 +347,7 @@ public:
 			// Fallthrough.
 		}
 
+		context->stimBuff->stop();
 		// Remove stimulus buffer from collection before destroying device
 		context->stimBuff->device->nAttachedStimBuffs--;
 		auto it = std::find(