Create isolate files for nonparallel tests.

webrtc/build/apk_tests_noop.gyp

 # Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # See webrtc/build/apk_tests.gyp for more information about this file.
 {
@@ skipping 40 matching lines @@
     },
     {
       'target_name': 'video_engine_tests_apk',
       'type': 'none',
     },
     {
       'target_name': 'voice_engine_unittests_apk',
       'type': 'none',
     },
     {
+      'target_name': 'webrtc_nonparallel_tests_apk',
+      'type': 'none',
+    },
+    {
       'target_name': 'webrtc_perf_tests_apk',
       'type': 'none',
     },
     {
       'target_name': 'audio_codec_speed_tests_apk',
       'type': 'none',
     },
   ],
 }