[Android] Add ChromiumNetTestSupport.apk for the java EmbeddedTestServer.

net/android/BUILD.gn

Index: net/android/BUILD.gn
diff --git a/net/android/BUILD.gn b/net/android/BUILD.gn
index df00495ad2559cac5051f948d7f59693529e7c95..b8232482e48306cc0e4717c75e03481be9d01475 100644
--- a/net/android/BUILD.gn
+++ b/net/android/BUILD.gn
@@ -26,14 +26,47 @@ android_aidl("remote_android_keystore_aidl") {
   ]
 }
 
+android_aidl("embedded_test_server_aidl") {
+  interface_file = "../test/android/javatests/src/org/chromium/net/test/IEmbeddedTestServerInterface.aidl"
+  sources = [
+    "../test/android/javatests/src/org/chromium/net/test/IEmbeddedTestServerImpl.aidl",
+  ]
+}
+
 android_library("net_java_test_support") {
+  testonly = true
   DEPRECATED_java_in_dir = "../test/android/javatests/src"
   deps = [
     ":net_java",
     "//base:base_java",
+    "//base:base_java_test_support",
     "//third_party/android_tools:legacy_http_javalib",
   ]
-  srcjar_deps = [ ":net_java_test_support_enums_srcjar" ]
+  srcjar_deps = [
+    ":embedded_test_server_aidl",
+    ":net_java_test_support_enums_srcjar",
+  ]
+}
+
+shared_library("net_java_test_native_support") {
+  testonly = true
+  deps = [
+    "//net:test_support",
+  ]
+}
+
+android_apk("net_test_support_apk") {
+  testonly = true
+  deps = [
+    ":net_java_test_native_support",
+    ":net_java_test_support",
+    "//base:base_java",
+  ]
+  android_manifest = "../test/android/javatests/AndroidManifest.xml"
+  apk_name = "ChromiumNetTestSupport"
+  native_libs = [ "libnet_java_test_native_support.so" ]
+  native_libraries_template =
+      "//base/test/android/java/templates/NativeTestLibraries.template"
 }
 
 android_resources("net_unittests_apk_resources") {
@@ -42,6 +75,7 @@ android_resources("net_unittests_apk_resources") {
 }
 
 android_library("net_javatests") {
+  testonly = true
   DEPRECATED_java_in_dir = "javatests/src"
   deps = [
     ":net_java",