Make IndividualPickerFragment package-private accessible

Make IndividualPickerFrament's member functions package-private
accessible to extend its usage

Bug: 120519505
Change-Id: I54c7f9646e2a5d9e34c3531276f08ac949820fc1
diff --git a/src/com/android/wallpaper/picker/TopLevelPickerActivity.java b/src/com/android/wallpaper/picker/TopLevelPickerActivity.java
index 25540f1..553a19a 100755
--- a/src/com/android/wallpaper/picker/TopLevelPickerActivity.java
+++ b/src/com/android/wallpaper/picker/TopLevelPickerActivity.java
@@ -787,7 +787,9 @@
                         .remove(fragment)
                         .commit();
             }
-            IndividualPickerFragment newFragment = IndividualPickerFragment.newInstance(collectionId);
+            Injector injector = InjectorProvider.getInjector();
+            IndividualPickerFragment newFragment = injector.getIndividualPickerFragment(
+                    collectionId);
             fm.beginTransaction()
                     .add(R.id.fragment_container, newFragment)
                     .commit();