Plumb context through for serialization.

Change-Id: I2a49f57aa7576604deeac898a7cceb36ae68d66f
diff --git a/rsProgramStore.cpp b/rsProgramStore.cpp
index 7e25a22..83c1f2c 100644
--- a/rsProgramStore.cpp
+++ b/rsProgramStore.cpp
@@ -63,7 +63,7 @@
     rsc->mHal.funcs.store.setActive(rsc, this);
 }
 
-void ProgramStore::serialize(OStream *stream) const {
+void ProgramStore::serialize(Context *rsc, OStream *stream) const {
 }
 
 ProgramStore *ProgramStore::createFromStream(Context *rsc, IStream *stream) {