Extract and update incremental trace hook

src/template/incremental/Notification.tt

@@ -234,9 +234,7 @@ $endif
   #resetVisit
   #resetCache
   #(signature)_handler.notifyDependencies();
-  $if (TraceFlush)
-  $HostClass.this.state().trace().flushIncAttr($HostClass.this, "#signature", "", "");
-  $endif
+  $include(AttrDecl.traceFlushIncAttr)
 }
 $endif
 $endif

src/template/trace/TraceHooks.tt

@@ -323,6 +323,12 @@ state().trace().flushAttr("#getAspectName", this, "#hostClassName.#signatureJava
 $endif
 ]]
 
+AttrDecl.traceFlushIncAttr [[
+$if (TraceFlush)
+state().trace().flushIncAttr("#getAspectName", fNode, fAttrID, "", "");
+$endif
+]]
+
 CollEq.traceContributionCheckBegin [[
 $if (TraceColl)
 state().trace().contributionCheckBegin("#getAspectName", this, "#collectionId", "#escapeConditionForTemplate");