Adjust for pipeline stalls

Bug: 20853441

Calculating duration that crosses the UI-RT
sync point will now subtract out the time spent waiting
in queue under the assumption that this time will be
accounted for in the previous frame's metrics

Change-Id: Ia8213f4410638840613f5ae439e98dfb77532a6a
diff --git a/libs/hwui/FrameInfo.cpp b/libs/hwui/FrameInfo.cpp
index 85998f1..41e2233 100644
--- a/libs/hwui/FrameInfo.cpp
+++ b/libs/hwui/FrameInfo.cpp
@@ -30,6 +30,7 @@
     "AnimationStart",
     "PerformTraversalsStart",
     "DrawStart",
+    "SyncQueued",
     "SyncStart",
     "IssueDrawCommandsStart",
     "SwapBuffers",