Have vkGetRefreshCycleDurationGOOGLE query SF every time.

When VK_GOOGLE_display_timing was first created, we assumed displays
never changed refresh rates.  Now that they are dynamic, we need to
query SF everytime the app requests it.

Test: ANGLE-on-Vulkan
Bug: b/130888074
Change-Id: I5eb9a20690f82b8663899a2ded8b5bb866cebe58
diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index bc00190..a22f60e 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -222,6 +222,15 @@
             window,
             &refresh_duration);
     }
+    uint64_t get_refresh_duration()
+    {
+        ANativeWindow* window = surface.window.get();
+        native_window_get_refresh_cycle_duration(
+            window,
+            &refresh_duration);
+        return static_cast<uint64_t>(refresh_duration);
+
+    }
 
     Surface& surface;
     uint32_t num_images;
@@ -1730,8 +1739,7 @@
     Swapchain& swapchain = *SwapchainFromHandle(swapchain_handle);
     VkResult result = VK_SUCCESS;
 
-    pDisplayTimingProperties->refreshDuration =
-            static_cast<uint64_t>(swapchain.refresh_duration);
+    pDisplayTimingProperties->refreshDuration = swapchain.get_refresh_duration();
 
     return result;
 }