Make StringPiece to be std::string_view alias

Bug: 237583012
Test: build + boot + UTs

Change-Id: I849831f4466d3b9c7ec842b75256e7fcba77a0c0
diff --git a/tools/aapt2/cmd/Convert.cpp b/tools/aapt2/cmd/Convert.cpp
index 52e113e..612e3a6 100644
--- a/tools/aapt2/cmd/Convert.cpp
+++ b/tools/aapt2/cmd/Convert.cpp
@@ -387,7 +387,7 @@
   }
 
   Context context;
-  const StringPiece& path = args[0];
+  StringPiece path = args[0];
   unique_ptr<LoadedApk> apk = LoadedApk::LoadApkFromPath(path, context.GetDiagnostics());
   if (apk == nullptr) {
     context.GetDiagnostics()->Error(android::DiagMessage(path) << "failed to load APK");