Fix setName use-after-free

Bug: 20764439
Change-Id: I7a0f85bb82629b1302db02015fa493dc09eb31f7
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index d15fa39..7c04f40 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -135,7 +135,7 @@
     SETUP_TASK(setName);
     args->context = mContext;
     args->name = name;
-    post(task);
+    postAndWait(task);
 }
 
 CREATE_BRIDGE2(initialize, CanvasContext* context, ANativeWindow* window) {