Allow Device.create_device(None)

This uses dpctl.SyclQueue() to create the queue from default selector

Author: oleksandr-pavlyk

dpctl/tensor/_device.py

@@ -65,7 +65,10 @@ def create_device(cls, dev):
                     "targeting this device".format(dev)
                 )
         else:
-            obj.sycl_queue_ = dpctl.SyclQueue(dev)
+            if dev is None:
+                obj.sycl_queue_ = dpctl.SyclQueue()
+            else:
+                obj.sycl_queue_ = dpctl.SyclQueue(dev)
         return obj
 
     @property