Build a way to decide card width

Slice cards in contextual homepage are shown as half card or full card.
We will use Category field of ContextualCard to decide card width.

In this CL, also fixed the problem of not showing full card after a
consecutive suggestion card dismissal.

Bug: 119655434
Bug: 121315057
Test: visual, robotest
Change-Id: I3243b9db21b8f288cab88238b20d7d50a2a20d46

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

@@ -17,6 +17,7 @@
 package com.android.settings.homepage.contextualcards;
 
 import static com.android.settings.homepage.contextualcards.ContextualCardLoader.CARD_CONTENT_LOADER_ID;
+import static com.android.settings.intelligence.ContextualCardProto.ContextualCard.Category.SUGGESTION_VALUE;
 
 import static java.util.stream.Collectors.groupingBy;
 
@@ -172,7 +173,8 @@ public class ContextualCardManager implements ContextualCardLoader.CardContentLo
 
         //replace with the new data
         mContextualCards.clear();
-        mContextualCards.addAll(sortCards(allCards));
+        final List<ContextualCard> sortedCards = sortCards(allCards);
+        mContextualCards.addAll(assignCardWidth(sortedCards));
 
         loadCardControllers();
 
@@ -224,6 +226,24 @@ public class ContextualCardManager implements ContextualCardLoader.CardContentLo
         mListener = listener;
     }
 
+    @VisibleForTesting
+    List<ContextualCard> assignCardWidth(List<ContextualCard> cards) {
+        final List<ContextualCard> result = new ArrayList<>(cards);
+        // Shows as half cards if 2 suggestion type of cards are next to each other.
+        // Shows as full card if 1 suggestion type of card lives alone.
+        for (int index = 1; index < result.size(); index++) {
+            final ContextualCard previous = result.get(index - 1);
+            final ContextualCard current = result.get(index);
+            if (current.getCategory() == SUGGESTION_VALUE
+                    && previous.getCategory() == SUGGESTION_VALUE) {
+                result.set(index - 1, previous.mutate().setIsHalfWidth(true).build());
+                result.set(index, current.mutate().setIsHalfWidth(true).build());
+                index++;
+            }
+        }
+        return result;
+    }
+
     private List<ContextualCard> getCardsToKeep(List<ContextualCard> cards) {
         if (mSavedCards != null) {
             //screen rotate