SWDEV-335780 - Indicate if handler is queued

Maintain status of handler callback. For event records we no longer
submit callbacks to reduce the load on the async handler thread. However
without a callback we leak command memory/decrement refcounts. Indicate
status of the handler which we can use to queue a callback when
finish is called.

Change-Id: I89fd02f3d047a0e8162664ee17581a14795f1928

rocclr/device/rocm/rocvirtual.cpp

@@ -446,11 +446,12 @@ hsa_signal_t VirtualGPU::HwQueueTracker::ActiveSignal(
           ClPrint(amd::LOG_INFO, amd::LOG_SIG, "Set Handler: handle(0x%lx), timestamp(%p)",
             prof_signal->signal_.handle, prof_signal);
         }
-
+        SetHandlerPending(false);
         // Update the current command/marker with HW event
         prof_signal->retain();
         ts->command().SetHwEvent(prof_signal);
       } else if (ts->command().profilingInfo().marker_ts_) {
+        SetHandlerPending(true);
         // Update the current command/marker with HW event
         prof_signal->retain();
         ts->command().SetHwEvent(prof_signal);