AAPT2: Ensure output formats of files are correctly set

When compiling straight to proto from source, the file types
were not set correctly (binary XML or proto XML).

Bug: 73406447
Test: manual
Change-Id: I68c1881a00a2ec1ad58f7ec485af2543d262d076
diff --git a/tools/aapt2/ResourceValues.cpp b/tools/aapt2/ResourceValues.cpp
index 77cee06..6f213e1 100644
--- a/tools/aapt2/ResourceValues.cpp
+++ b/tools/aapt2/ResourceValues.cpp
@@ -369,6 +369,19 @@
 
 void FileReference::Print(std::ostream* out) const {
   *out << "(file) " << *path;
+  switch (type) {
+    case ResourceFile::Type::kBinaryXml:
+      *out << " type=XML";
+      break;
+    case ResourceFile::Type::kProtoXml:
+      *out << " type=protoXML";
+      break;
+    case ResourceFile::Type::kPng:
+      *out << " type=PNG";
+      break;
+    default:
+      break;
+  }
 }
 
 BinaryPrimitive::BinaryPrimitive(const android::Res_value& val) : value(val) {