recovery: Get UI and locale from device.

This removes some reliance on the global
locale and ui variables.

Test: Recovery works
Bug: 78793464
Change-Id: I78f1a2b321f5d50aa58b10735a73ae137283353a

screen_ui.cpp

@@ -748,6 +748,10 @@ bool ScreenRecoveryUI::Init(const std::string& locale) {
   return true;
 }
 
+std::string ScreenRecoveryUI::GetLocale() {
+  return locale_;
+}
+
 void ScreenRecoveryUI::LoadAnimation() {
   std::unique_ptr<DIR, decltype(&closedir)> dir(opendir("/res/images"), closedir);
   dirent* de;