Implement ConnectionService.setAudioModeIsVoip

Change-Id: I29028e614c598d1f2501c4dfdcdbfc929b09f925
diff --git a/src/com/android/telecomm/CallsManager.java b/src/com/android/telecomm/CallsManager.java
index 3884adb..d451162 100644
--- a/src/com/android/telecomm/CallsManager.java
+++ b/src/com/android/telecomm/CallsManager.java
@@ -61,6 +61,7 @@
         void onCannedSmsResponsesLoaded(Call call);
         void onCallVideoProviderChanged(Call call);
         void onFeaturesChanged(Call call);
+        void onAudioModeIsVoipChanged(Call call);
     }
 
     private static final CallsManager INSTANCE = new CallsManager();
@@ -226,6 +227,13 @@
         }
     }
 
+    @Override
+    public void onAudioModeIsVoipChanged(Call call) {
+        for (CallsManagerListener listener : mListeners) {
+            listener.onAudioModeIsVoipChanged(call);
+        }
+    }
+
     ImmutableCollection<Call> getCalls() {
         return ImmutableList.copyOf(mCalls);
     }