Move wrapPassthrough into details.

Test: pass

Bug: 36075507
Change-Id: I61e72ffc1e1eab19514dc943c59d41857d91309c
diff --git a/generateCpp.cpp b/generateCpp.cpp
index 13d887e..85a5806 100644
--- a/generateCpp.cpp
+++ b/generateCpp.cpp
@@ -536,7 +536,7 @@
         out << wrappedName
             << " = "
             << iface.fqName().cppName()
-            << "::castFrom(::android::hardware::wrapPassthrough("
+            << "::castFrom(::android::hardware::details::wrapPassthrough("
             << name << "));\n";
         out.sIf(wrappedName + " == nullptr", [&] {
             // Fatal error. Happens when the BsFoo class is not found in the binary