Add layer tracing tags in new pipeline

bug:28596354

Change-Id: I351cb50c8c9ddfc73be73d28a1af94d2a8f9992e
diff --git a/libs/hwui/FrameBuilder.cpp b/libs/hwui/FrameBuilder.cpp
index 502f027..84c8a74 100644
--- a/libs/hwui/FrameBuilder.cpp
+++ b/libs/hwui/FrameBuilder.cpp
@@ -82,6 +82,9 @@
         // removed during a dropped frame, but layers may still remain scheduled so
         // as not to lose info on what portion is damaged
         if (CC_LIKELY(layerNode->getLayer() != nullptr)) {
+            ATRACE_FORMAT("Optimize HW Layer DisplayList %s %ux%u",
+                    layerNode->getName(), layerNode->getWidth(), layerNode->getHeight());
+
             const Rect& layerDamage = layers.entries()[i].damage;
             layerNode->computeOrdering();