MOBILE-2314 core: Exclude emulator from production

angular.json

@@ -50,6 +50,10 @@
                 {
                   "replace": "src/testing/testing.module.ts",
                   "with": "src/testing/testing.module.prod.ts"
+                },
+                {
+                  "replace": "src/core/features/emulator/emulator.module.ts",
+                  "with": "src/core/features/emulator/emulator.module.prod.ts"
                 }
               ],
               "optimization": {

src/core/features/emulator/emulator.module.prod.ts

@@ -0,0 +1,21 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+
+/**
+ * Stub used in production to avoid including emulator code in production bundles.
+ */
+@NgModule({})
+export class CoreEmulatorModule {}