Add AIDL audio HAL service to SEPolicy

This adds the two top interfaces: IConfig and IModule
to service context, allows the HAL service to call
Binder, and registers the example implementation
service executable.

Bug: 205884982
Test: m
Change-Id: I322e813c96123167ea29b6c25a08ec9677c9b4d1
diff --git a/public/hal_audio.te b/public/hal_audio.te
index d1970b9..52caa00 100644
--- a/public/hal_audio.te
+++ b/public/hal_audio.te
@@ -7,6 +7,8 @@
 
 allow hal_audio ion_device:chr_file r_file_perms;
 
+binder_call(hal_audio_server, servicemanager)
+
 r_dir_file(hal_audio, proc)
 r_dir_file(hal_audio, proc_asound)
 allow hal_audio_server audio_device:dir r_dir_perms;