Add function to show localized rescue party menu

Add a function in screenUI to display the pre-generated graphs for
rescue party. If these graphs are not valid, falls back to display
the old text strings.

Right now we haven't generated the localized graphs yet, so the UI
always shows the TextMenu.

Bug: 116655889
Test: check rescue party under recovery
Change-Id: I0558cb536b659cdc25c8b7946d3a39820935b003
diff --git a/wear_ui.cpp b/wear_ui.cpp
index 8f3bc7b..0611f94 100644
--- a/wear_ui.cpp
+++ b/wear_ui.cpp
@@ -95,13 +95,14 @@
 
 void WearRecoveryUI::SetStage(int /* current */, int /* max */) {}
 
-void WearRecoveryUI::StartMenu(const std::vector<std::string>& headers,
-                               const std::vector<std::string>& items, size_t initial_selection) {
-  std::lock_guard<std::mutex> lg(updateMutex);
+std::unique_ptr<Menu> WearRecoveryUI::CreateMenu(const std::vector<std::string>& text_headers,
+                                                 const std::vector<std::string>& text_items,
+                                                 size_t initial_selection) const {
   if (text_rows_ > 0 && text_cols_ > 0) {
-    menu_ = std::make_unique<TextMenu>(scrollable_menu_, text_rows_ - menu_unusable_rows_ - 1,
-                                       text_cols_ - 1, headers, items, initial_selection,
-                                       char_height_, *this);
-    update_screen_locked();
+    return std::make_unique<TextMenu>(scrollable_menu_, text_rows_ - menu_unusable_rows_ - 1,
+                                      text_cols_ - 1, text_headers, text_items, initial_selection,
+                                      char_height_, *this);
   }
+
+  return nullptr;
 }