Teach JankTracker about new swap behaviors

Bug: 30440166

If we are using HWC2, there's a change in timing
when in triple buffering with the pipelined offsets.
This changes JankTracker to recognize that and silently
erase that from the total duration

Change-Id: Ib1fd4209070f17dbd2baed707c8cf73fb11c3cf2
diff --git a/libs/hwui/FrameInfo.h b/libs/hwui/FrameInfo.h
index 0baca39..1fe5459 100644
--- a/libs/hwui/FrameInfo.h
+++ b/libs/hwui/FrameInfo.h
@@ -48,6 +48,9 @@
     SwapBuffers,
     FrameCompleted,
 
+    DequeueBufferDuration,
+    QueueBufferDuration,
+
     // Must be the last value!
     NumIndexes
 };