test: mock useParagonTheme behavior

Author: dcoa

src/setupTest.js

@@ -13,6 +13,7 @@ import messages from './i18n';
 jest.mock('@edx/frontend-platform/react/hooks', () => ({
   ...jest.requireActual('@edx/frontend-platform/react/hooks'),
   useTrackColorSchemeChoice: jest.fn(),
+  useParagonTheme: () => [{ isThemeLoaded: true }, jest.fn()],
 }));
 
 Object.defineProperty(window, 'matchMedia', {
@@ -57,11 +58,6 @@ export function initializeMockApp() {
   return { loggingService, i18nService, authService };
 }
 
-jest.mock('@edx/frontend-platform/react/hooks', () => ({
-  ...jest.requireActual('@edx/frontend-platform/react/hooks'),
-  useTrackColorSchemeChoice: jest.fn(),
-}));
-
 function render(ui, options) {
   // eslint-disable-next-line react/prop-types
   function Wrapper({ children }) {