Move sticky cards to the bottom

Sticky cards have higher scores and were on the top of homepage.

Bug: 149274976
Test: visual
Change-Id: I5fc2303ac42fff5bc4d44e355112ea4529253acd

src/com/android/settings/homepage/contextualcards/ContextualCardManager.java

@@ -170,9 +170,16 @@ public class ContextualCardManager implements ContextualCardLoader.CardContentLo
     @VisibleForTesting
     List<ContextualCard> sortCards(List<ContextualCard> cards) {
         // take mContextualCards as the source and do the ranking based on the rule.
-        return cards.stream()
+        final List<ContextualCard> result = cards.stream()
                 .sorted((c1, c2) -> Double.compare(c2.getRankingScore(), c1.getRankingScore()))
                 .collect(Collectors.toList());
+        final List<ContextualCard> stickyCards = result.stream()
+                .filter(c -> c.getCategory() == STICKY_VALUE)
+                .collect(Collectors.toList());
+        // make sticky cards be at the tail end.
+        result.removeAll(stickyCards);
+        result.addAll(stickyCards);
+        return result;
     }
 
     @Override