Put AidlInterface members behind methods

Change-Id: Ib367a9183e734a008acecf90c5f3f25e51e16b37
Test: Full android build
Bug: 24410295
Signed-off-by: Casey Dahlin <sadmac@google.com>
diff --git a/generate_java.cpp b/generate_java.cpp
index d71f8cc..54bc246 100644
--- a/generate_java.cpp
+++ b/generate_java.cpp
@@ -59,7 +59,8 @@
 
     Document* document = new Document;
         document->comment = "";
-        if (iface->package) document->package = iface->package;
+        if (!iface->GetPackage().empty())
+            document->package = iface->GetPackage();
         document->originalSrc = originalSrc;
         document->classes.push_back(cl);