SWDEV-431879 - Introduce IsHandlerPending back.

It seems that due to removal of vdev()->isHandlerPending(),
Marker queued to ensure finish is not enqueued and that cause
hung at waiting event for kernel enqueue command.

Change-Id: I364abb2dcb4897b11a7eb61b5d85013b69292792

rocclr/device/pal/palvirtual.hpp

@@ -341,6 +341,8 @@ class VirtualGPU : public device::VirtualDevice {
 
   void profilerAttach(bool enable = false) {}
 
+  bool isHandlerPending() const { return false; }
+
   bool isFenceDirty() const { return false; }
 
   inline bool dispatchAqlPacket(uint8_t* aqlpacket, amd::AccumulateCommand* vcmd = nullptr) {