Migrate some suggestions related classes SettingsLib(II)

Remove classes from Settings.

Test: mm Settings/tests/robotests

Change-Id: I0f046d6a750bc53251deb44887e8665e6d545515

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

@@ -24,6 +24,7 @@ import android.support.annotation.NonNull;
 import android.util.Pair;
 
 import com.android.settingslib.drawer.Tile;
+import com.android.settingslib.suggestions.SuggestionControllerMixin;
 
 import java.util.List;