Rename removeVideoCallListener to unregisterCallback

Change-Id: Ie6b5ac9131e81900efc7d3fa67056aa47d566a44
diff --git a/telecomm/java/android/telecom/InCallService.java b/telecomm/java/android/telecom/InCallService.java
index 1cdddd4..e5d6ae0 100644
--- a/telecomm/java/android/telecom/InCallService.java
+++ b/telecomm/java/android/telecom/InCallService.java
@@ -372,7 +372,7 @@
         /**
          * Clears the video call listener set via {@link #setVideoCallListener(Listener)}.
          */
-        public abstract void removeVideoCallListener();
+        public abstract void unregisterCallback();
 
         /**
          * Sets the camera to be used for video recording in a video call.