Move off ZipString and over to std::string/std::string_view as appropriate.

Bug: http://b/129068177
Test: treehugger
Change-Id: Ib46761d89772d3a3c655a39df573fd305c117d19
diff --git a/tools/aapt2/cmd/Convert_test.cpp b/tools/aapt2/cmd/Convert_test.cpp
index ddc146c..f35237e 100644
--- a/tools/aapt2/cmd/Convert_test.cpp
+++ b/tools/aapt2/cmd/Convert_test.cpp
@@ -132,7 +132,7 @@
   int count = 0;
 
   // Can't pass nullptrs into Next()
-  ZipString zip_name;
+  std::string zip_name;
   ZipEntry zip_data;
 
   while ((result = Next(cookie, &zip_data, &zip_name)) == 0) {