Track libziparchive API change.

Bug: http://b/129068177
Test: treehugger
Change-Id: Id4b202502b07e08102deda49f7d28ba10a63bb0a
diff --git a/libs/androidfw/ApkAssets.cpp b/libs/androidfw/ApkAssets.cpp
index 47b7d64..7ba7828 100644
--- a/libs/androidfw/ApkAssets.cpp
+++ b/libs/androidfw/ApkAssets.cpp
@@ -206,9 +206,8 @@
     root_path_full += '/';
   }
 
-  ::ZipString prefix(root_path_full.c_str());
   void* cookie;
-  if (::StartIteration(zip_handle_.get(), &cookie, &prefix, nullptr) != 0) {
+  if (::StartIteration(zip_handle_.get(), &cookie, root_path_full, "") != 0) {
     return false;
   }