Pass back transformHint on Surface Creation

Bug: 141939598
Test: build, boot, SurfaceFlinger_test, libgui_test,
libsurfaceflinger_unittest

Change-Id: I35a77ac1399ad4248cb1c2357afb869de4c15170
diff --git a/services/surfaceflinger/BufferStateLayer.h b/services/surfaceflinger/BufferStateLayer.h
index 289bb17..8e6a70c 100644
--- a/services/surfaceflinger/BufferStateLayer.h
+++ b/services/surfaceflinger/BufferStateLayer.h
@@ -63,6 +63,7 @@
     }
     Rect getCrop(const Layer::State& s) const;
 
+    uint32_t getTransformHint() const { return mTransformHint; }
     bool setTransform(uint32_t transform) override;
     bool setTransformToDisplayInverse(bool transformToDisplayInverse) override;
     bool setCrop(const Rect& crop) override;