Work around improper ListView recycling in TrustAgentSettings

Previously, the views for our SwitchPreference would never
be recycled because they weren't present in onCreate, which
broke accessibility events.

Bug: 21837103
Change-Id: I01f40b4e6df6d807b77f985116a57334e4ca4868

src/com/android/settings/TrustAgentSettings.java

@@ -79,6 +79,7 @@ public class TrustAgentSettings extends SettingsPreferenceFragment implements
 
     public void onResume() {
         super.onResume();
+        removePreference("dummy_preference");
         updateAgents();
     };