Rename ZipEntryName to ZipString

This is for https://android-review.googlesource.com/#/c/156771/.

Bug: 21957428
Change-Id: Iccd8053cfb050456f749cf7df4de705493918181
diff --git a/libdex/ZipArchive.h b/libdex/ZipArchive.h
index e293bf0..206afd5 100644
--- a/libdex/ZipArchive.h
+++ b/libdex/ZipArchive.h
@@ -70,7 +70,7 @@
  */
 DEX_INLINE int  dexZipFindEntry(const ZipArchiveHandle pArchive,
     const char* entryName, ZipEntry* data) {
-    return FindEntry(pArchive, ZipEntryName(entryName), data);
+    return FindEntry(pArchive, ZipString(entryName), data);
 }
 
 /*