And one more backend for hidl-gen to create a simple static java library

exporting all annotated constants.

Bug: 32200867
Test: make
Change-Id: Ifddf296fea7b31cbf7bf8d3a42159ad43004805c
diff --git a/Type.cpp b/Type.cpp
index eafda3a..d0b8f9d 100644
--- a/Type.cpp
+++ b/Type.cpp
@@ -404,7 +404,8 @@
         std::vector<const Type *> * /* exportedTypes */) const {
 }
 
-status_t Type::emitExportedHeader(Formatter & /* out */) const {
+status_t Type::emitExportedHeader(
+        Formatter & /* out */, bool /* forJava */) const {
     return OK;
 }