Fix broken test

Test: robotests
Fixes: 189352955
Change-Id: I31066a6fdd72e923369e613b656ffe767b3e3b5c

src/com/android/settings/notification/app/ConversationListPreferenceController.java

@@ -69,9 +69,7 @@ public abstract class ConversationListPreferenceController extends AbstractPrefe
             populateConversations(conversations, containerGroup);
         }
 
-        if (containerGroup.getPreferenceCount() == 0) {
-            containerGroup.setVisible(false);
-        } else {
+        if (containerGroup.getPreferenceCount() != 0) {
             Preference summaryPref = getSummaryPreference();
             if (summaryPref != null) {
                 containerGroup.addPreference(summaryPref);