Re-use existing params declaration in onboarding (#31363)

Re-use existing params declarations in onboarding

selfdrive/ui/qt/offroad/onboarding.cc

@@ -199,7 +199,7 @@ OnboardingWindow::OnboardingWindow(QWidget *parent) : QStackedWidget(parent) {
   TermsPage* terms = new TermsPage(this);
   addWidget(terms);
   connect(terms, &TermsPage::acceptedTerms, [=]() {
-    Params().put("HasAcceptedTerms", current_terms_version);
+    params.put("HasAcceptedTerms", current_terms_version);
     accepted_terms = true;
     updateActiveScreen();
   });
@@ -209,7 +209,7 @@ OnboardingWindow::OnboardingWindow(QWidget *parent) : QStackedWidget(parent) {
   addWidget(tr);
   connect(tr, &TrainingGuide::completedTraining, [=]() {
     training_done = true;
-    Params().put("CompletedTrainingVersion", current_training_version);
+    params.put("CompletedTrainingVersion", current_training_version);
     updateActiveScreen();
   });