Add app_api_service to connmetrics_service

This allows the ConnectivityMetrics app to dump connmetrics service
metrics.

Bug: 31254800
Change-Id: I4c3da8cc80a5820dbed9843badc1464f3ae40581

service.te

@@ -39,7 +39,7 @@ type contexthub_service, app_api_service, system_server_service, service_manager
 type IProxyService_service, app_api_service, system_server_service, service_manager_type;
 type commontime_management_service, system_server_service, service_manager_type;
 type connectivity_service, app_api_service, system_server_service, service_manager_type;
-type connmetrics_service, system_server_service, service_manager_type;
+type connmetrics_service, app_api_service, system_server_service, service_manager_type;
 type consumer_ir_service, app_api_service, system_server_service, service_manager_type;
 type content_service, app_api_service, system_server_service, service_manager_type;
 type country_detector_service, app_api_service, system_server_service, service_manager_type;