audio: Add support for multiple metainfo keys update

Add changes to read acdb metainfo key and module name from platform
info xml. Changes to add acdb key values to a list and query key value
based on module name.

CRs-Fixed: 1081424
Change-Id: Ia287a27c86f63fea16cdb35d553de6e2e853b4e9
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 71c05df..d7b5f3a 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -5069,7 +5069,7 @@
                                                         "visualizer_hal_stop_output");
         }
     }
-    audio_extn_init();
+    audio_extn_init(adev);
     audio_extn_listen_init(adev, adev->snd_card);
     audio_extn_sound_trigger_init(adev);
     audio_extn_gef_init(adev);