chore: update spreadsheet app (#4500)

* chore: update spreadsheet app

* chore: code cleanup

Author: yanmariomenev

examples-standalone/spreadsheet-app/angular.json

@@ -27,7 +27,8 @@
             "index": "src/index.html",
             "browser": "src/main.ts",
             "polyfills": [
-              "zone.js"
+              "zone.js",
+              "@angular/localize/init"
             ],
             "tsConfig": "tsconfig.app.json",
             "assets": [
@@ -89,7 +90,8 @@
           "options": {
             "polyfills": [
               "zone.js",
-              "zone.js/testing"
+              "zone.js/testing",
+              "@angular/localize/init"
             ],
             "tsConfig": "tsconfig.spec.json",
             "assets": [