Allow mainline supplicant to make binder
calls into system server.

Permission is required in order for the
mainline supplicant to invoke callbacks
in the system server.

Bug: 365585450
Test: Manual test - used a local patch
      to invoke a callback from the
      mainline supplicant into system server
Change-Id: I30f897e1a281896f1929cb0a51ab8262fdcd6ffb
diff --git a/private/wifi_mainline_supplicant.te b/private/wifi_mainline_supplicant.te
index c18cef6..dba35a6 100644
--- a/private/wifi_mainline_supplicant.te
+++ b/private/wifi_mainline_supplicant.te
@@ -2,6 +2,7 @@
 type wifi_mainline_supplicant_exec, system_file_type, exec_type, file_type;
 
 binder_use(wifi_mainline_supplicant)
+binder_call(wifi_mainline_supplicant, system_server)
 init_daemon_domain(wifi_mainline_supplicant)
 add_service(wifi_mainline_supplicant, wifi_mainline_supplicant_service)