Add disable_brotli_filter and use_platform_icu_alternatives to cronet builder config.

scripts/slave/recipes/cronet.expected/android_cronet_armv6_builder.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup index.lock",
@@ skipping 142 matching lines @@
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_CROSSCOMPILE": "1",
-      "GYP_DEFINES": "OS=android arm_version=6 component=static_library disable_file_support=1 disable_ftp_support=1 enable_bidirectional_stream=1 enable_websockets=0 fastbuild=1 gomadir='[BUILD]/goma' target_arch=arm use_goma=1",
+      "GYP_DEFINES": "OS=android arm_version=6 component=static_library disable_brotli_filter=1 disable_file_support=1 disable_ftp_support=1 enable_bidirectional_stream=1 enable_websockets=0 fastbuild=1 gomadir='[BUILD]/goma' target_arch=arm use_goma=1 use_platform_icu_alternatives=1",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/tools/mb/mb.py",
       "gen",
@@ skipping 445 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]