Added vsync debugging information in dumpsys log

Change-Id: I20ef05a73d89caaf6a70dc9ca25ada6e6a1f6ff9
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 7814594..76aadf8 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -144,6 +144,7 @@
     nsecs_t                 mRefreshPeriod;
     size_t                  mVSyncCount;
     sp<VSyncThread>         mVSyncThread;
+    bool                    mDebugForceFakeVSync;
 };