Add sepolicy for IpMemoryStoreService

Bug: 116512211
Test: Builds, boots, including upcoming changes needing this
Change-Id: I6f119368c5a4f7ac6c0325915dff60124c5a6399
diff --git a/private/service_contexts b/private/service_contexts
index 51980ad..fe25191 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -82,6 +82,7 @@
 iphonesubinfo                             u:object_r:radio_service:s0
 ims                                       u:object_r:radio_service:s0
 imms                                      u:object_r:imms_service:s0
+ipmemorystore                             u:object_r:ipmemorystore_service:s0
 ipsec                                     u:object_r:ipsec_service:s0
 iris                                      u:object_r:iris_service:s0
 isms_msim                                 u:object_r:radio_service:s0