Pass context creation flags to driver init.

Change-Id: I08806939c0fdaf87ff234a78f7f309d0d0dc548c
diff --git a/rsContext.cpp b/rsContext.cpp
index 878daa1..9af9f6e 100644
--- a/rsContext.cpp
+++ b/rsContext.cpp
@@ -531,6 +531,7 @@
         rsc->mSynchronous = true;
     }
     rsc->mContextType = ct;
+    rsc->mHal.flags = flags;
 
     if (!rsc->initContext(dev, sc)) {
         delete rsc;