Allow SystemServer to start PersistentDataBlockService

Change-Id: I0e8433c4fcbce04e2693a0f8cf1dd89c95684c24
diff --git a/service_contexts b/service_contexts
index 0f4212b..28aa0c9 100644
--- a/service_contexts
+++ b/service_contexts
@@ -73,6 +73,7 @@
 notification                              u:object_r:system_server_service:s0
 package                                   u:object_r:system_server_service:s0
 permission                                u:object_r:system_server_service:s0
+persistent_data_block                     u:object_r:system_server_service:s0
 phone_msim                                u:object_r:radio_service:s0
 phone1                                    u:object_r:radio_service:s0
 phone2                                    u:object_r:radio_service:s0