Hide getUserSelectedOutgoingPhoneAccount

Bug:20224972
Change-Id: I21528788e38817f77fc68b56e26a33ac726d39e2
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 28534ea..60b9cb9 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -376,6 +376,7 @@
      * exists no user-chosen default {@code PhoneAccount}.
      *
      * @return The user outgoing phone account selected by the user.
+     * @hide
      */
     public PhoneAccountHandle getUserSelectedOutgoingPhoneAccount() {
         try {