Add audio streams to CallTest and a first A/V call test.

webrtc/video_engine_tests.isolate

 # 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.
 {
   'conditions': [
     ['OS=="linux" or OS=="mac" or OS=="win" or OS=="android"', {
       'variables': {
         'files': [
           '<(DEPTH)/resources/foreman_cif_short.yuv',
+          '<(DEPTH)/resources/voice_engine/audio_long16.pcm',
         ],
       },
     }],
     ['OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'command': [
           '<(PRODUCT_DIR)/video_engine_tests<(EXECUTABLE_SUFFIX)',
         ],
         'files': [
           '<(DEPTH)/DEPS',
           '<(PRODUCT_DIR)/video_engine_tests<(EXECUTABLE_SUFFIX)',
         ],
       },
     }],
   ],
 }