[Menu][A11y] Update Menu Catalog Demo to use Ctrl + Enter for Context Menu

The context menu in the Menu catalog demo now opens when `Ctrl + Enter` is pressed on a keyboard, instead of just `Enter`. The description text has also been updated to reflect this change.

PiperOrigin-RevId: 802901209

Author: Material Design Team

catalog/java/io/material/catalog/menu/MenuMainDemoFragment.java

@@ -36,6 +36,7 @@
 import android.util.TypedValue;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -90,7 +91,7 @@ public View onCreateDemoView(
     iconMenuButton.setOnClickListener(v -> showMenu(v, R.menu.menu_with_icons));
 
     TextView contextMenuTextView = view.findViewById(R.id.context_menu_tv);
-    registerForContextMenu(contextMenuTextView);
+    setupContextMenuWithKeyboard(contextMenuTextView);
 
     Button listPopupWindowButton = view.findViewById(R.id.list_popup_window);
     ListPopupWindow listPopupWindow = initializeListPopupMenu(listPopupWindowButton);
@@ -99,6 +100,20 @@ public View onCreateDemoView(
     return view;
   }
 
+  private void setupContextMenuWithKeyboard(View view) {
+    registerForContextMenu(view);
+    view.setOnKeyListener(
+        (v, keyCode, event) -> {
+          if (event.getAction() == KeyEvent.ACTION_DOWN
+              && event.isCtrlPressed()
+              && (keyCode == KeyEvent.KEYCODE_ENTER || keyCode == KeyEvent.KEYCODE_DPAD_CENTER)) {
+            v.showContextMenu();
+            return true;
+          }
+          return false;
+        });
+  }
+
   @SuppressWarnings("RestrictTo")
   private void showMenu(View v, @MenuRes int menuRes) {
     PopupMenu popup = new PopupMenu(getContext(), v);

catalog/java/io/material/catalog/menu/res/values/strings.xml

@@ -31,7 +31,7 @@
   </string>
 
   <string name="menu_context_menu_description" description="Text explaining how to use context menus [CHAR_LIMIT=NONE].">
-    This TextView opens a context menu when long pressed or by pressing Enter on a keyboard.
+    This TextView opens a context menu when long pressed or by pressing Ctrl + Enter on a keyboard.
     \n\nIt provides actions that affect the selected content or context frame.
   </string>
   <string name="context_menu_highlight" description="text for a menu option to highlight text [CHAR_LIMIT=20].">Highlight</string>