Add defaults to memoryHandleContext structure

Change-Id: If82510dff1ab77d4b4c3c77079035ca2ca15ea10

Author: saik-intel

level_zero/tools/source/sysman/memory/memory.h

@@ -38,8 +38,8 @@ struct MemoryHandleContext {
 
     ze_result_t memoryGet(uint32_t *pCount, zet_sysman_mem_handle_t *phMemory);
 
-    OsSysman *pOsSysman;
-    bool isLmemSupported;
+    OsSysman *pOsSysman = nullptr;
+    bool isLmemSupported = false;
     std::vector<Memory *> handleList;
     ze_device_handle_t hCoreDevice;
 };