[Catalog][Cards] Make card selection accessible

PiperOrigin-RevId: 440123538

Author: paulfthomas

catalog/java/io/material/catalog/card/SelectableCardsAdapter.java

@@ -31,6 +31,7 @@
 import androidx.recyclerview.selection.SelectionTracker;
 import com.google.android.material.card.MaterialCardView;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 /** An Adapter that works with a collection of selectable card items */
@@ -98,6 +99,13 @@ private void bind(Item item, int position) {
       if (selectionTracker != null) {
         bindSelectedState();
       }
+      // Set an OnLongClickListener for accessibility
+      materialCardView.setOnLongClickListener(
+          v -> {
+            selectionTracker.setItemsSelected(
+                Arrays.asList(details.getSelectionKey()), !materialCardView.isChecked());
+            return true;
+          });
     }
 
     private void bindSelectedState() {