Add sepolicy for IpMemoryStoreService

Bug: 116512211
Test: Builds, boots, including upcoming changes needing this
Change-Id: I6f119368c5a4f7ac6c0325915dff60124c5a6399
diff --git a/private/system_app.te b/private/system_app.te
index ed19b82..39af1e6 100644
--- a/private/system_app.te
+++ b/private/system_app.te
@@ -74,6 +74,7 @@
   -dumpstate_service
   -installd_service
   -iorapd_service
+  -ipmemorystore_service
   -netd_service
   -virtual_touchpad_service
   -vold_service