build(service-worker): enable karma bazel test for service-worker (#21053)

Corrected the environment detection code which was incorretly throwing exception in the browser if `require` function was found.

PR Close #21053

packages/service-worker/test/BUILD.bazel

@@ -32,8 +32,6 @@ ts_web_test(
     bootstrap = [
         "//:angular_bootstrap_scripts",
     ],
-    # dissable since tests are running but not yet passing
-    tags = ["manual"],
     # do not sort
     deps = [
         "//packages/_testing_init:browser",

packages/service-worker/worker/testing/scope.ts

@@ -96,8 +96,7 @@ export class SwTestHarness implements ServiceWorkerGlobalScope, Adapter, Context
   } as any;
 
   static envIsSupported(): boolean {
-    return (typeof require === 'function' && typeof require('url')['parse'] === 'function') ||
-        (typeof URL === 'function');
+    return (typeof URL === 'function') || (typeof require === 'function' && typeof require('url')['parse'] === 'function');
   }
 
   time: number;