Use SimRefreshResponse struct in RIL Versions greater than 7.

Modify condition to use SimRefreshResponse struct in
all RIL Versions greater than 7.

CRs-Fixed: 597007

Change-Id: I40fb4ad96e191ae6641eb31da014515d08704382
diff --git a/libril/ril.cpp b/libril/ril.cpp
index 4a5e7d9..ddb7669 100644
--- a/libril/ril.cpp
+++ b/libril/ril.cpp
@@ -2560,7 +2560,7 @@
     }
 
     startResponse;
-    if (s_callbacks.version == 7) {
+    if (s_callbacks.version >= 7) {
         RIL_SimRefreshResponse_v7 *p_cur = ((RIL_SimRefreshResponse_v7 *) response);
         p.writeInt32(p_cur->result);
         p.writeInt32(p_cur->ef_id);