Fix the unaligned title of injected items

Remove the summary space holder for the injected items that are not
assigned a summary or a summary uri.

Test: visual, robotest
Fixes: 187006845
Bug: 182357397

Change-Id: I7b3d165f0ffd771dd0110962c9e3159c4977d6e3

src/com/android/settings/dashboard/DashboardFeatureProviderImpl.java

@@ -280,8 +280,6 @@ public class DashboardFeatureProviderImpl implements DashboardFeatureProvider {
                     METHOD_GET_DYNAMIC_SUMMARY);
             refreshSummary(uri, preference);
             return createDynamicDataObserver(METHOD_GET_DYNAMIC_SUMMARY, uri, preference);
-        } else {
-            preference.setSummary(R.string.summary_placeholder);
         }
         return null;
     }