Create SEPolicy for the new supervision service.

Test: m
Change-Id: I389c6c830907c0e55bff3458308adf5b4ccb8a52
diff --git a/private/service_contexts b/private/service_contexts
index d1eecd5..60c9b62 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -426,6 +426,10 @@
 storagestats                              u:object_r:storagestats_service:s0
 # sdk_sandbox here refers to the service name, not the domain name.
 sdk_sandbox                               u:object_r:sdk_sandbox_service:s0
+
+is_flag_enabled(RELEASE_SUPERVISION_SERVICE, `
+    supervision                               u:object_r:supervision_service:s0
+')
 SurfaceFlinger                            u:object_r:surfaceflinger_service:s0
 SurfaceFlingerAIDL                        u:object_r:surfaceflinger_service:s0
 suspend_control                           u:object_r:system_suspend_control_service:s0