Serializing display lists

This is a WIP prototype

Change-Id: Id4bfcf2b7bf905221c3734b7b6887c9b2efd37e6
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index a3a0163..b838811 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -490,6 +490,17 @@
     post(task);
 }
 
+CREATE_BRIDGE1(serializeDisplayListTree, CanvasContext* context) {
+    args->context->serializeDisplayListTree();
+    return nullptr;
+}
+
+void RenderProxy::serializeDisplayListTree() {
+    SETUP_TASK(serializeDisplayListTree);
+    args->context = mContext;
+    post(task);
+}
+
 void RenderProxy::post(RenderTask* task) {
     mRenderThread.queue(task);
 }