Fetch summary only if feature is available

onResume(loads summary) of controller seems to be invoked even when availabilty status
is unspported.

Bug: 278294334
Test: manual
Change-Id: I2486a7d61bea1b981ae56f0ff32b9d411be2ad14

src/com/android/settings/applications/ClonedAppsPreferenceController.java

@@ -75,6 +75,9 @@ public class ClonedAppsPreferenceController extends BasePreferenceController
     }
 
     private void updatePreferenceSummary() {
+        if (!isAvailable()) {
+            return;
+        }
         new AsyncTask<Void, Void, Integer[]>() {
 
             @Override