backToPicker method
Implementation
Future<void> backToPicker() async {
_selectedFiles.clear();
_pickerMode = false;
pickerPageController = PageController(initialPage: 1);
update();
await pageController.animateToPage(
0,
duration: const Duration(milliseconds: 500),
curve: Curves.easeIn,
);
selectedAlbum = null;
update();
}