sf: avoid assumption remote binder is local am: 4271f564

void RegionSamplingThread::addListener(const Rect& samplingArea, const sp<IBinder>& stopLayerHandle,

                                       const sp<IRegionSamplingListener>& listener) {

    wp<Layer> stopLayer = stopLayerHandle != nullptr

            ? static_cast<Layer::Handle*>(stopLayerHandle.get())->owner

            : nullptr;

    wp<Layer> stopLayer;

    if (stopLayerHandle != nullptr && stopLayerHandle->localBinder() != nullptr) {

        stopLayer = static_cast<Layer::Handle*>(stopLayerHandle.get())->owner;

    }

    sp<IBinder> asBinder = IInterface::asBinder(listener);

    asBinder->linkToDeath(this);