Swipe to dismiss suggestions

- Move dismiss suggestion logic into feature provider
- In DashboardData, use hashcode as suggestion's stable id. This is much
  more likely to provide a truely stable id for each suggestion card.
  Eventually I want to use hash for all tiles to provide stable id.
- Add a SuggestionDismissionController to handle swipe to dismiss
  callbacks

Change-Id: If3770f07a90c5469a0b86fc28f3eb5e4c17227cd
Fix: 35159816
Test: make RunSettingsRoboTests

src/com/android/settings/dashboard/suggestions/SuggestionFeatureProvider.java

@@ -18,6 +18,7 @@ package com.android.settings.dashboard.suggestions;
 
 import android.content.Context;
 
+import com.android.settingslib.SuggestionParser;
 import com.android.settingslib.drawer.Tile;
 
 import java.util.List;
@@ -38,8 +39,14 @@ public interface SuggestionFeatureProvider {
 
     /**
      * Ranks the list of suggestions in place.
-     * @param suggestions: List of suggestion Tiles
-     * @param suggestionIds: List of suggestion ids corresponding to the suggestion tiles.
+     *
+     * @param suggestions   List of suggestion Tiles
+     * @param suggestionIds List of suggestion ids corresponding to the suggestion tiles.
      */
     void rankSuggestions(final List<Tile> suggestions, List<String> suggestionIds);
+
+    /**
+     * Dismisses a suggestion.
+     */
+    void dismissSuggestion(Context context, SuggestionParser parser, Tile suggestion);
 }