IMS: Notify supplementary service failed for call hold failures

- We need to notify supplementary service failed in case call
  hold fails.

BUG=26770582

Change-Id: Ie9855b35803c9f6dd8698dd9dc1fa7bb195989c0
diff --git a/src/com/android/phone/CallNotifier.java b/src/com/android/phone/CallNotifier.java
index dd1eaab..93f9875 100644
--- a/src/com/android/phone/CallNotifier.java
+++ b/src/com/android/phone/CallNotifier.java
@@ -917,6 +917,9 @@
             if (DBG) log("onSuppServiceFailed: displaying merge failure message");
             mergeFailedString = mApplication.getResources().getString(
                     R.string.incall_error_supp_service_switch);
+        } else if (r.result == Phone.SuppService.HOLD) {
+            mergeFailedString = mApplication.getResources().getString(
+                    R.string.incall_error_supp_service_hold);
         }
         PhoneDisplayMessage.displayErrorMessage(mApplication, mergeFailedString);