livoxGen1: call PcloudStimulusBuffer::start/stop

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

include/user/stimulusBuffer.h

@@ -69,6 +69,9 @@ public:
 	// Control methods
 	void start()
 	{
+		std::cout << __func__ << ": Starting stimulus buffer for device "
+			<< deviceAttachmentSpec.deviceSelector << std::endl;
+
 		shouldContinue.store(true);
 		scheduleNextTimeout();
 	}
@@ -141,6 +144,9 @@ inline void StimulusBuffer::stop()
 
 	bridge.waitForAsyncOperationCompleteOrIoServiceStopped();
 
+	std::cout << __func__ << ": Stopped stimulus buffer for device "
+		<< deviceAttachmentSpec.deviceSelector << std::endl;
+
 	// After delay, cancel timer and perform cleanup
 	timer.cancel();
 }

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(