Add GPU draw stats to gfxinfo and GraphicsStatsService

Test: ran dumpsys with gfxinfo and graphicsstats
Change-Id: Id9950de87dc4343c6878baa6a6dd42fbc8aeddef
diff --git a/libs/hwui/JankTracker.h b/libs/hwui/JankTracker.h
index 110211e..08059268 100644
--- a/libs/hwui/JankTracker.h
+++ b/libs/hwui/JankTracker.h
@@ -58,6 +58,7 @@
 
     FrameInfo* startFrame() { return &mFrames.next(); }
     void finishFrame(const FrameInfo& frame);
+    void finishGpuDraw(const FrameInfo& frame);
 
     void dumpStats(int fd) { dumpData(fd, &mDescription, mData.get()); }
     void dumpFrames(int fd);