Move ADM initialization into WebRtcVoiceEngine

Bug: webrtc:4690
Change-Id: I3b8950fdb13835964c5bf41162731eff5048bf1a
Reviewed-on: https://webrtc-review.googlesource.com/23820
Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20823}
diff --git a/media/engine/adm_helpers.h b/media/engine/adm_helpers.h
index d04db17..c6ea3a2 100644
--- a/media/engine/adm_helpers.h
+++ b/media/engine/adm_helpers.h
@@ -19,8 +19,7 @@
 
 namespace adm_helpers {
 
-void SetRecordingDevice(AudioDeviceModule* adm);
-void SetPlayoutDevice(AudioDeviceModule* adm);
+void Init(AudioDeviceModule* adm);
 
 }  // namespace adm_helpers
 }  // namespace webrtc