Merge "Check if the trace was stopped before starting the tracing thread" into...

      : mFlinger(flinger), mSfLock(flinger.mDrawingStateLock) {}

void SurfaceTracing::mainLoop() {

    addFirstEntry();

    bool enabled = true;

    bool enabled = addFirstEntry();

    while (enabled) {

        LayersTraceProto entry = traceWhenNotified();

        enabled = addTraceToBuffer(entry);

    }

}

void SurfaceTracing::addFirstEntry() {

bool SurfaceTracing::addFirstEntry() {

    const auto displayDevice = mFlinger.getDefaultDisplayDevice();

    LayersTraceProto entry;

    {

        std::scoped_lock lock(mSfLock);

        entry = traceLayersLocked("tracing.enable", displayDevice);

    }

    addTraceToBuffer(entry);

    return addTraceToBuffer(entry);

}

LayersTraceProto SurfaceTracing::traceWhenNotified() {

    };

    void mainLoop();

    void addFirstEntry();

    bool addFirstEntry();

    LayersTraceProto traceWhenNotified();

    LayersTraceProto traceLayersLocked(const char* where,

                                       const sp<const DisplayDevice>& displayDevice)