Fix missing #include of GrBackendSurfaceMutableState.h

And some other includes that are missing and may cause issues
in future refactors.

See http://review.skia.org/704942

Change-Id: I3109cb4ca9b0868df13fb130f5cd8b8523a8cb93
diff --git a/libs/hwui/AutoBackendTextureRelease.cpp b/libs/hwui/AutoBackendTextureRelease.cpp
index b796585..d237cc2 100644
--- a/libs/hwui/AutoBackendTextureRelease.cpp
+++ b/libs/hwui/AutoBackendTextureRelease.cpp
@@ -18,6 +18,9 @@
 
 #include <SkImage.h>
 #include <include/gpu/ganesh/SkImageGanesh.h>
+#include <include/gpu/GrBackendSurfaceMutableState.h>
+#include <include/gpu/GrDirectContext.h>
+#include <include/gpu/GrBackendSurface.h>
 #include "renderthread/RenderThread.h"
 #include "utils/Color.h"
 #include "utils/PaintUtils.h"