SELinux permissions for companion device system service

Required for I0aeb653afd65e4adead13ea9c7248ec20971b04a

Test: Together with I0aeb653afd65e4adead13ea9c7248ec20971b04a, ensure that the
system service works
Bug: b/30932767
Change-Id: I994b1c74763c073e95d84222e29bfff5483c6a07
diff --git a/private/service_contexts b/private/service_contexts
index ebb3265..dffdbd9 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -22,6 +22,7 @@
 commontime_management                     u:object_r:commontime_management_service:s0
 common_time.clock                         u:object_r:mediaserver_service:s0
 common_time.config                        u:object_r:mediaserver_service:s0
+companion_device                          u:object_r:companion_device_service:s0
 connectivity                              u:object_r:connectivity_service:s0
 connectivity_metrics_logger               u:object_r:connectivity_metrics_logger_service:s0
 connmetrics                               u:object_r:connmetrics_service:s0