[Cronet] Move initialization to a new thread rather than the UI thread.

net/android/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
 android_library("net_java") {
   java_files = [
     "java/src/org/chromium/net/AndroidCellularSignalStrength.java",
@@ skipping 97 matching lines @@
 android_resources("net_unittests_apk_resources") {
   resource_dirs = [ "unittest_support/res" ]
   custom_package = "org.chromium.native_test"
 }
 
 android_library("net_javatests") {
   testonly = true
   java_files = [
     "javatests/src/org/chromium/net/AndroidKeyStoreTestUtil.java",
     "javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java",
+    "javatests/src/org/chromium/net/AndroidProxyConfigServiceTestUtil.java",
     "javatests/src/org/chromium/net/AndroidProxySelectorTest.java",
     "javatests/src/org/chromium/net/NetErrorsTest.java",
     "javatests/src/org/chromium/net/NetworkChangeNotifierTest.java",
     "javatests/src/org/chromium/net/X509UtilTest.java",
   ]
   deps = [
     ":net_java",
     ":net_java_test_support",
     "//base:base_java",
     "//base:base_java_test_support",
@@ skipping 34 matching lines @@
   java_files =
       [ "junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java" ]
   deps = [
     ":net_java",
     "//base:base_java",
     "//base:base_java_test_support",
     "//third_party/hamcrest:hamcrest_java",
   ]
   srcjar_deps = [ "//base:base_build_config_gen" ]
 }