recovery: Fix the crash caused by StartIteration

In the new version of libziparchive, the default values ​​of the optional_prefix and optional_suffix parameters of the StartIteration function are changed to empty strings, and nullptr is no longer detected.

Change-Id: I66ee58a9515586700b10a3d5aa5b780a6207b33c
(cherry picked from commit a202b5aa32c10ccb64603d75157817ab13144751)
diff --git a/install/ZipUtil.cpp b/install/ZipUtil.cpp
index 75acad9..690942a 100755
--- a/install/ZipUtil.cpp
+++ b/install/ZipUtil.cpp
@@ -56,7 +56,7 @@
     }
 
     const std::string zip_prefix(prefix_path.c_str());
-    int ret = StartIteration(zip, &cookie, zip_prefix, nullptr);
+    int ret = StartIteration(zip, &cookie, zip_prefix);
 
     if (ret != 0) {
         LOG(ERROR) << "failed to start iterating zip entries.";