Add sync in vulkan when writing to linear texture

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 71782777a55838c8cf97ff9a94ffa4f39c4d90e9..7d5fff6ef574d14b60d847e10d40cfe948047142 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -279,6 +279,7 @@ bool GrVkGpu::onWritePixels(GrSurface* surface,
                                       srcStageMask,
                                       dstStageMask,
                                       false);
+                this->submitCommandBuffer(kForce_SyncQueue);
             }
             success = this->uploadTexDataLinear(vkTex, left, top, width, height, config,
                                                 texels.begin()->fPixels, texels.begin()->fRowBytes);