[Android Webview] Refactor LoadUrlTest and work on embedded_test_server custom handler

android_webview/test/BUILD.gn

Index: android_webview/test/BUILD.gn
diff --git a/android_webview/test/BUILD.gn b/android_webview/test/BUILD.gn
index 5bf43bd11c95d748be6467efe2a774460a2a9a6e..636b2d711b6cf06cd535c08414dbde6e5bcd6ef0 100644
--- a/android_webview/test/BUILD.gn
+++ b/android_webview/test/BUILD.gn
@@ -124,6 +124,7 @@ instrumentation_test_apk("android_webview_test_apk") {
     "//ui/android:ui_java",
   ]
   java_files = [
+    "../embeddedtestserver/java/src/org/chromium/net/test/AwEmbeddedTestServer.java",
     "../javatests/src/org/chromium/android_webview/test/AcceptLanguageTest.java",
     "../javatests/src/org/chromium/android_webview/test/AndroidScrollIntegrationTest.java",
     "../javatests/src/org/chromium/android_webview/test/AndroidViewIntegrationTest.java",
@@ -215,7 +216,10 @@ instrumentation_test_apk("android_webview_test_apk") {
   data = [
     "data/",
   ]
-  additional_apks = [ "//net/android:net_test_support_apk" ]
+  additional_apks = [
+    "//net/android:net_test_support_apk",
+    "//android_webview/embeddedtestserver:aw_net_test_support_apk",
+  ]
 }
 
 test("android_webview_unittests") {