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/private/service_contexts b/private/service_contexts
index c7f8811..cac6ea8 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -1,3 +1,5 @@
+android.hardware.audio.core.IConfig/default                          u:object_r:hal_audio_service:s0
+android.hardware.audio.core.IModule/default                          u:object_r:hal_audio_service:s0
 android.hardware.authsecret.IAuthSecret/default                      u:object_r:hal_authsecret_service:s0
 android.hardware.automotive.evs.IEvsEnumerator/hw/0                  u:object_r:hal_evs_service:s0
 android.hardware.automotive.evs.IEvsEnumerator/hw/1                  u:object_r:hal_evs_service:s0