Implement broker pattern for imms (3/3)

b/16324360

Change-Id: I4adacdb1d87badfaa109da200aae91869b9786a8
diff --git a/service_contexts b/service_contexts
index 842bf14..e1f1298 100644
--- a/service_contexts
+++ b/service_contexts
@@ -48,7 +48,7 @@
 iphonesubinfo2                            u:object_r:radio_service:s0
 iphonesubinfo                             u:object_r:radio_service:s0
 ims                                       u:object_r:radio_service:s0
-imms                                      u:object_r:radio_service:s0
+imms                                      u:object_r:system_server_service:s0
 isms_msim                                 u:object_r:radio_service:s0
 isms2                                     u:object_r:radio_service:s0
 isms                                      u:object_r:radio_service:s0