revert changes in example app

@@ -62,12 +62,12 @@ class _BarcodeListScannerWithControllerState
               MobileScanner(
                 controller: controller,
                 fit: BoxFit.contain,
-                onBarcodeDetected: (barcodeCapture) {
+                onDetect: (barcodeCapture) {
                   setState(() {
                     this.barcodeCapture = barcodeCapture;
                   });
                 },
-                onScannerRestarted: (arguments) {
+                onScannerStarted: (arguments) {
                   // Do something with arguments.
                 },
               ),

@@ -62,7 +62,7 @@ class _BarcodeScannerWithControllerState
               MobileScanner(
                 controller: controller,
                 fit: BoxFit.contain,
-                onBarcodeDetected: (barcode) {
+                onDetect: (barcode) {
                   setState(() {
                     this.barcode = barcode;
                   });

@@ -84,7 +84,7 @@ class _BarcodeScannerReturningImageState
                     MobileScanner(
                       controller: controller,
                       fit: BoxFit.contain,
-                      onBarcodeDetected: (barcode) {
+                      onDetect: (barcode) {
                         setState(() {
                           this.barcode = barcode;
                         });