Fix NPE in onPageSelected

Check for null action view returned for the specified position.

Bug:15310717
Change-Id: I5fbec5808d47fac2b05d99eb0079c68db7f067ac
diff --git a/src/com/android/contacts/quickcontact/QuickContactActivity.java b/src/com/android/contacts/quickcontact/QuickContactActivity.java
index e950fcb..db3a341 100644
--- a/src/com/android/contacts/quickcontact/QuickContactActivity.java
+++ b/src/com/android/contacts/quickcontact/QuickContactActivity.java
@@ -710,6 +710,9 @@
         @Override
         public void onPageSelected(int position) {
             final CheckableImageView actionView = getActionViewAt(position);
+            if (actionView == null) {
+                return;
+            }
             mTrackScroller.requestChildRectangleOnScreen(actionView,
                     new Rect(0, 0, actionView.getWidth(), actionView.getHeight()), false);
             // Don't render rectangle if we are currently scrolling to prevent it from flickering