JBR-6045 WLToolkit(Vulkan): Add options to select physical device

Changed access to _name field, minor corrections in verbose print

(cherry picked from commit 36407e978c)

src/java.desktop/share/native/common/java2d/vulkan/VKBase.cpp

@@ -211,8 +211,8 @@ VKGraphicsEnvironment::VKGraphicsEnvironment() :
             fprintf(stderr, " %c%ld: %s\n", devNum == _default_device_number ? '*' : ' ',
                     devNum, (*devIter)->name().c_str());
         }
+        fprintf(stderr, "\n");
     }
-    fprintf(stderr, "\n");
     _default_device = &*_devices[_default_device_number]; // TODO pick first just to check hat virtual device creation works
     _default_device->init();
 

src/java.desktop/share/native/common/java2d/vulkan/VKBase.h

@@ -127,7 +127,7 @@ public:
         return *((const vk::raii::Device&) *this);
     }
 
-    std::string& name() {
+    const std::string& name() {
         return _name;
     }
 };