Fix adding a blocked number and return cause dialer to crash

+ BlockedListSearchFragment.onChangeFilteredNumberSuccess() calls
  activity.onBackPressed() instead of re-adding the management fragment.

Original fix was lost due to a bad merge.

Bug:25330660
Change-Id: Ib6d04dba55832845d145d2925cfb595237e7a19f
diff --git a/src/com/android/dialer/list/BlockedListSearchFragment.java b/src/com/android/dialer/list/BlockedListSearchFragment.java
index 24945b9..cfb84f3 100644
--- a/src/com/android/dialer/list/BlockedListSearchFragment.java
+++ b/src/com/android/dialer/list/BlockedListSearchFragment.java
@@ -203,8 +203,7 @@
         if (activity == null) {
             return;
         }
-
-        activity.showManagementUi();
+        activity.onBackPressed();
     }
 
     @Override