Fix includes of SkStream and SkData

Change-Id: I93e587a39be7e0c88862d0b2d7b0f6df8a02d29b
diff --git a/libs/renderengine/skia/SkiaGLRenderEngine.h b/libs/renderengine/skia/SkiaGLRenderEngine.h
index a650313..c891a70 100644
--- a/libs/renderengine/skia/SkiaGLRenderEngine.h
+++ b/libs/renderengine/skia/SkiaGLRenderEngine.h
@@ -41,6 +41,8 @@
 #include "filters/LinearEffect.h"
 #include "filters/StretchShaderFactory.h"
 
+class SkData;
+
 namespace android {
 namespace renderengine {
 namespace skia {