Lots of little cleanup improvements to Vulkan

src/gpu/vk/GrVkGpu.cpp

Index: src/gpu/vk/GrVkGpu.cpp
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index 9a8a6e4e8c5954f76b4dfa324260785fa7b0b70d..be3f987656c9614d92e72c959f659c3e736544a9 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -1570,6 +1570,7 @@ bool GrVkGpu::onCopySurface(GrSurface* dst,
                             const SkIPoint& dstPoint) {
     if (can_copy_as_resolve(dst, src, this)) {
         this->copySurfaceAsResolve(dst, src, srcRect, dstPoint);
+        return true;
     }
 
     GrVkImage* dstImage;