Reset scroll position when account filter is changed

Bug 29618694

Change-Id: Ie0b3b813b439726dc71da85ed01e4bf298bdce07
diff --git a/src/com/android/contacts/activities/PeopleActivity.java b/src/com/android/contacts/activities/PeopleActivity.java
index a0ceed0..7b5f3e6 100644
--- a/src/com/android/contacts/activities/PeopleActivity.java
+++ b/src/com/android/contacts/activities/PeopleActivity.java
@@ -518,6 +518,9 @@
             return;
         }
 
+        // Scroll to top after filter is changed.
+        mAllFragment.getListView().setSelectionAfterHeaderView();
+
         setFilterAndUpdateTitle(mContactListFilterController.getFilter());
         showFabWithAnimation(shouldShowFabForAccount());