expose hwui frame stats through FrameStatsObserver

Change-Id: I88884bafc8e2f6d7f67a36d3609490e83cf8afd5
diff --git a/libs/hwui/FrameInfo.h b/libs/hwui/FrameInfo.h
index f8013ab..0baca39 100644
--- a/libs/hwui/FrameInfo.h
+++ b/libs/hwui/FrameInfo.h
@@ -118,6 +118,10 @@
         set(FrameInfoIndex::Flags) |= static_cast<uint64_t>(frameInfoFlag);
     }
 
+    const int64_t* data() const {
+        return mFrameInfo;
+    }
+
     inline int64_t operator[](FrameInfoIndex index) const {
         return get(index);
     }