[Java hidl-gen] Fix multi-dimensional arrays (used within structures, not

as method arguments).

Bug: 31438033
Change-Id: I8e29ae8eca2a9ef8a320e37ca0bb79dcfa8a9b9a
diff --git a/Method.cpp b/Method.cpp
index c051a77..7d7717a 100644
--- a/Method.cpp
+++ b/Method.cpp
@@ -123,10 +123,10 @@
         }
 
         std::string extra;
-        out += arg->type().getJavaType();
+        out += arg->type().getJavaType(&extra);
+        out += extra;
         out += " ";
         out += arg->name();
-        out += extra;
 
         first = false;
     }