Merge changes from topic "free_up_space_card_preference" into sc-dev

* changes:
  Tweak UI of CardPreference and ContextualCard
  'Free up space' uses CardPreference

src/com/android/settings/widget/CardPreference.java

@@ -29,6 +29,7 @@ import com.google.android.material.card.MaterialCardView;
  * Preference that wrapped by {@link MaterialCardView}, only support to set icon, title and summary
  */
 public class CardPreference extends Preference {
+
     public CardPreference(Context context) {
         this(context, null /* attrs */);
     }