Initial commit of Java backend to hidl-gen.

Change-Id: I38b62637df74d3e5daf702a8996502d0d5726033
diff --git a/EnumType.h b/EnumType.h
index 939cd3b..6453166 100644
--- a/EnumType.h
+++ b/EnumType.h
@@ -23,6 +23,9 @@
 
     std::string getCppType(StorageMode mode, std::string *extra) const override;
 
+    std::string getJavaType() const override;
+    std::string getJavaSuffix() const override;
+
     void emitReaderWriter(
             Formatter &out,
             const std::string &name,
@@ -32,6 +35,7 @@
             ErrorMode mode) const override;
 
     status_t emitTypeDeclarations(Formatter &out) const override;
+    status_t emitJavaTypeDeclarations(Formatter &out) const override;
 
 private:
     std::vector<EnumValue *> *mValues;