Unregister broadcast receiver from AppInfoDashboardFragment.

- onDestroy() call is missing from the fragment. Added it to unregister
the receiver that listens to the package remover.

Change-Id: I27c67a19e11824116849b769f0a7951b80c40f84
Fixes: 72879457
Test: make RunSettingsRoboTests

src/com/android/settings/applications/appinfo/AppInfoDashboardFragment.java

@@ -174,6 +174,12 @@ public class AppInfoDashboardFragment extends DashboardFragment
         setHasOptionsMenu(true);
     }
 
+    @Override
+    public void onDestroy() {
+        stopListeningToPackageRemove();
+        super.onDestroy();
+    }
+
     @Override
     public int getMetricsCategory() {
         return MetricsEvent.APPLICATIONS_INSTALLED_APP_DETAILS;
@@ -737,7 +743,8 @@ public class AppInfoDashboardFragment extends DashboardFragment
         }
     }
 
-    private void startListeningToPackageRemove() {
+    @VisibleForTesting
+    void startListeningToPackageRemove() {
         if (mListeningToPackageRemove) {
             return;
         }
@@ -755,7 +762,8 @@ public class AppInfoDashboardFragment extends DashboardFragment
         getContext().unregisterReceiver(mPackageRemovedReceiver);
     }
 
-    private final BroadcastReceiver mPackageRemovedReceiver = new BroadcastReceiver() {
+    @VisibleForTesting
+    final BroadcastReceiver mPackageRemovedReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             final String packageName = intent.getData().getSchemeSpecificPart();