Add constructor for DisconnectCause that does not require a tone.

In order to create a DisconnectCause with a label/description that does
not require specifying a tone.

Bug: 17486242
Change-Id: If82605ff20fc9f53ed41b49e12575424c6efc2b6
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index b0b6fb9..a71161a 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -161,7 +161,7 @@
 
         /**
          * @return For a {@link #STATE_DISCONNECTED} {@code Call}, the disconnect cause expressed
-         * by {@link android.telecomm.DisconnectCause}.
+         * by {@link android.telecom.DisconnectCause}.
          */
         public DisconnectCause getDisconnectCause() {
             return mDisconnectCause;