audio: unify hal

Unify audio hal components

CRs-Fixed: 2380934
Change-Id: Iacafdc44d935de5f343240421a1572a0a3241bd0
diff --git a/hal/voice.h b/hal/voice.h
index bc9aa21..d257e1b 100644
--- a/hal/voice.h
+++ b/hal/voice.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
  * Not a contribution.
  *
  * Copyright (C) 2013 The Android Open Source Project
@@ -60,6 +60,7 @@
 struct voice {
     struct voice_session session[MAX_VOICE_SESSIONS];
     int tty_mode;
+    bool hac;
     bool mic_mute;
     bool use_device_mute;
     float volume;