Add includes of android/hardware_buffer.h

This will be removed from SkSurface.h in http://review.skia.org/700223

Change-Id: Ia174cb42fbf667c8e8d926d45eb32d76325f2c23
diff --git a/libs/renderengine/skia/AutoBackendTexture.cpp b/libs/renderengine/skia/AutoBackendTexture.cpp
index 76fc92d..fc9b4da 100644
--- a/libs/renderengine/skia/AutoBackendTexture.cpp
+++ b/libs/renderengine/skia/AutoBackendTexture.cpp
@@ -24,6 +24,7 @@
 #include <include/gpu/ganesh/SkImageGanesh.h>
 #include <include/gpu/ganesh/SkSurfaceGanesh.h>
 
+#include <android/hardware_buffer.h>
 #include "ColorSpaces.h"
 #include "log/log_main.h"
 #include "utils/Trace.h"