Loading suggestions via legacy SuggestionService sometimes

When legacy_suggestion flag is turned on, load Suggestions from
SuggestionService instead of contextual homepage, because contextual
homepage infrastructure might not be availble on all devices.

Bug: 118842099
Test: robo
Change-Id: I91710c005e11be5a9b3dd39ceff670106e7f80c3

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

@@ -33,12 +33,12 @@ public class ContextualCard {
     /**
      * Flags indicating the type of the ContextualCard.
      */
-    @IntDef({CardType.DEFAULT, CardType.SLICE, CardType.SUGGESTION, CardType.CONDITIONAL})
+    @IntDef({CardType.DEFAULT, CardType.SLICE, CardType.LEGACY_SUGGESTION, CardType.CONDITIONAL})
     @Retention(RetentionPolicy.SOURCE)
     public @interface CardType {
         int DEFAULT = 0;
         int SLICE = 1;
-        int SUGGESTION = 2;
+        int LEGACY_SUGGESTION = 2;
         int CONDITIONAL = 3;
     }