Make GrSamplerState.h and GrRenderTarget.h private

Change-Id: Id7a270f5a528e1a4a6d94474fa092545252753b3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/234667
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrTestUtils.h b/src/gpu/GrTestUtils.h
index b4da37b..220757e 100644
--- a/src/gpu/GrTestUtils.h
+++ b/src/gpu/GrTestUtils.h
@@ -14,12 +14,12 @@
 
 #include "include/core/SkPathEffect.h"
 #include "include/core/SkStrokeRec.h"
-#include "include/gpu/GrSamplerState.h"
 #include "include/private/SkMacros.h"
 #include "include/private/SkTemplates.h"
 #include "include/utils/SkRandom.h"
 #include "src/gpu/GrColor.h"
 #include "src/gpu/GrFPArgs.h"
+#include "src/gpu/GrSamplerState.h"
 #include "src/shaders/SkShaderBase.h"
 
 class GrColorSpaceInfo;