hidl-gen: add sanitizedName to emitReaderWriterEmbedded.

* Fix weird variable names in autogenerated code for vec<vec<T>>.

Bug: 31955917

Test: hidl_test
Change-Id: I83363a6d12babae1aba8e118451e1ec80492012c
diff --git a/Type.cpp b/Type.cpp
index 5c65a3e..db877d4 100644
--- a/Type.cpp
+++ b/Type.cpp
@@ -154,6 +154,7 @@
         Formatter &,
         size_t,
         const std::string &,
+        const std::string &,
         bool,
         const std::string &,
         bool,