Fix ~,! typo when clearing kRenderTarget flag

src/image/SkSurface_Gpu.cpp

Index: src/image/SkSurface_Gpu.cpp
diff --git a/src/image/SkSurface_Gpu.cpp b/src/image/SkSurface_Gpu.cpp
index 03fdecef3a720115cf531c22bdf69c8e1df1cba2..846e2141cda013cac6a59d7d49a3919e5951c7ff 100644
--- a/src/image/SkSurface_Gpu.cpp
+++ b/src/image/SkSurface_Gpu.cpp
@@ -85,7 +85,7 @@ SkImage* SkSurface_Gpu::onNewImageSnapshot(Budgeted budgeted, ForceCopyMode forc
     if (kYes_ForceCopyMode == forceCopyMode || !tex) {
         GrSurfaceDesc desc = fDevice->accessRenderTarget()->desc();
         GrContext* ctx = fDevice->context();
-        desc.fFlags = desc.fFlags & !kRenderTarget_GrSurfaceFlag;
+        desc.fFlags = desc.fFlags & ~kRenderTarget_GrSurfaceFlag;
         copy.reset(ctx->textureProvider()->createTexture(desc, kYes_Budgeted == budgeted));
         if (!copy) {
             return nullptr;