fix(navigation): open download queue from snackbar actions

lib/widgets/view_queue_snackbar_action.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+import 'package:spotiflac_android/l10n/l10n.dart';
+import 'package:spotiflac_android/services/shell_navigation_service.dart';
+
+SnackBarAction buildViewQueueSnackBarAction(BuildContext context) {
+  return SnackBarAction(
+    label: context.l10n.snackbarViewQueue,
+    onPressed: () {
+      ShellNavigationService.requestTab(ShellTab.library);
+    },
+  );
+}