Add soundtrigger3 HAL (AIDL) to sepolicy

Test: Compile and boot. Don't yet have a HAL implementation to test
      with.
Change-Id: I387abd0e8913eef865cba2aee0a4ef714232bb19
diff --git a/private/service_contexts b/private/service_contexts
index 1965d65..826bc3a 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -15,6 +15,7 @@
 android.hardware.security.keymint.IRemotelyProvisionedComponent/default u:object_r:hal_remotelyprovisionedcomponent_service:s0
 android.hardware.security.secureclock.ISecureClock/default             u:object_r:hal_secureclock_service:s0
 android.hardware.security.sharedsecret.ISharedSecret/default             u:object_r:hal_sharedsecret_service:s0
+android.hardware.soundtrigger3.ISoundTriggerHw/default               u:object_r:hal_audio_service:s0
 android.hardware.vibrator.IVibrator/default                          u:object_r:hal_vibrator_service:s0
 android.hardware.vibrator.IVibratorManager/default                   u:object_r:hal_vibrator_service:s0
 android.hardware.weaver.IWeaver/default                              u:object_r:hal_weaver_service:s0