SEPolicy changes to support Attestation Verification Service

Bug: 201696614
Change-Id: I4a7a830ba809ed59a030a87c4f479199685d8a42
Test: Verify device boots
diff --git a/private/service_contexts b/private/service_contexts
index ee40677..805c6b3 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -56,6 +56,7 @@
 app_prediction                            u:object_r:app_prediction_service:s0
 app_search                                u:object_r:app_search_service:s0
 apexservice                               u:object_r:apex_service:s0
+attestation_verification                  u:object_r:attestation_verification_service:s0
 blob_store                                u:object_r:blob_store_service:s0
 gsiservice                                u:object_r:gsi_service:s0
 appops                                    u:object_r:appops_service:s0