Add uce service to core policy.

This service is requested by AOSP framework, but there is no context for
it defined.

Bug: 136023468
Test: N/A
Change-Id: Ibc5b048aaa1c9eda7b9180caca92cb876c3f6b28
Merged-In: Ibc5b048aaa1c9eda7b9180caca92cb876c3f6b28
(cherry picked from commit 67cb30fabf50e3ce2f08e9edd4e14214c11571a4)
diff --git a/private/service_contexts b/private/service_contexts
index 4da8922..e6d18b9 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -197,6 +197,7 @@
 thermalservice                            u:object_r:thermal_service:s0
 trust                                     u:object_r:trust_service:s0
 tv_input                                  u:object_r:tv_input_service:s0
+uce                                       u:object_r:uce_service:s0
 uimode                                    u:object_r:uimode_service:s0
 updatelock                                u:object_r:updatelock_service:s0
 uri_grants                                u:object_r:uri_grants_service:s0