hal: enable audio zoom feature dynamically

- based on libaudiozoom and runtime feature flag
  enable \ disable audio zoom feature

Change-Id: I3dcab630e84e99108a541614b3467f0e70c1f274
diff --git a/hal/ahal_config_helper.h b/hal/ahal_config_helper.h
index 39ed68e..d658f7d 100644
--- a/hal/ahal_config_helper.h
+++ b/hal/ahal_config_helper.h
@@ -76,6 +76,7 @@
     bool incall_music_enabled;
     bool compress_voip_enabled;
     bool dynamic_ecns_enabled;
+    bool audio_zoom_enabled;
 } AHalValues;
 
 #ifdef __cplusplus