Add sepolicy for people service

This is to allow people service to publish a binder service that expose
system private APIs to retrive and manage the recent cached
conversations.

Test: build and run on a test device
Bug: 162593584
Change-Id: I31b5d8bc851ea7225e215b3f86ed6d47b32b1ba4
diff --git a/private/service_contexts b/private/service_contexts
index 254ab5f..db00592 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -156,6 +156,7 @@
 overlay                                   u:object_r:overlay_service:s0
 package                                   u:object_r:package_service:s0
 package_native                            u:object_r:package_native_service:s0
+people                                    u:object_r:people_service:s0
 permission                                u:object_r:permission_service:s0
 permissionmgr                             u:object_r:permissionmgr_service:s0
 persistent_data_block                     u:object_r:persistent_data_block_service:s0