Fix vulkan onGetWritePixelsInfo

When the configs are the same in Vulkan we know we can do write pixels,
but the caller may need to do a draw, so make sure we set up the
tempDrawInfo before returning.

BUG=skia:5461, skia:5458
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2108873003

Review-Url: https://codereview.chromium.org/2108873003
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index ca6ccde..e5d24fc 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -252,10 +252,6 @@
         return false;
     }
 
-    if (dstSurface->config() == srcConfig) {
-        return true;
-    }
-
     GrRenderTarget* renderTarget = dstSurface->asRenderTarget();
 
     // Start off assuming no swizzling
@@ -271,6 +267,10 @@
     tempDrawInfo->fTempSurfaceDesc.fSampleCnt = 0;
     tempDrawInfo->fTempSurfaceDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
 
+    if (dstSurface->config() == srcConfig) {
+        return true;
+    }
+
     if (renderTarget && this->vkCaps().isConfigRenderable(renderTarget->config(), false)) {
         ElevateDrawPreference(drawPreference, kRequireDraw_DrawPreference);