drm_hwcomposer: Plumb frame number through display composition

Having frame number in the composition is very useful for
debugging transient issues, plumb it through the drm compositor
stack.

Change-Id: Ibc7555c89bea79c580b3201b11db4ced6360efb9
Signed-off-by: Sean Paul <seanpaul@chromium.org>
diff --git a/drmcomposition.h b/drmcomposition.h
index ee2e258..426ced0 100644
--- a/drmcomposition.h
+++ b/drmcomposition.h
@@ -42,7 +42,7 @@
  public:
   DrmComposition(DrmResources *drm, Importer *importer);
 
-  int Init();
+  int Init(uint64_t frame_no);
 
   int SetLayers(size_t num_displays,
                 const DrmCompositionDisplayLayersMap *maps);