Report apptest_runner device not found infra failures.

mandoline/tools/android_run_mandoline.py

 #!/usr/bin/env python
 # 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 argparse
 import logging
 import os
 import sys
 
 sys.path.insert(0, os.path.join(os.path.abspath(os.path.dirname(__file__)),
-                                '../../mojo/tools'))
+                                os.pardir, os.pardir, 'mojo', 'tools'))
 
 from mopy.android import AndroidShell
 from mopy.config import Config
 
 USAGE = ("android_run_mandoline.py [<shell-and-app-args>] [<mojo-app>]")
 
 def main():
   logging.basicConfig()
 
   parser = argparse.ArgumentParser(usage=USAGE)
 
   debug_group = parser.add_mutually_exclusive_group()
   debug_group.add_argument('--debug', help='Debug build (default)',
                            default=True, action='store_true')
   debug_group.add_argument('--release', help='Release build', default=False,
                            dest='debug', action='store_false')
   parser.add_argument('--target-cpu', help='CPU architecture to run for.',
                       choices=['x64', 'x86', 'arm'], default='arm')
   parser.add_argument('--device', help='Serial number of the target device.')
   parser.add_argument('--gdb', help='Run gdb',
                       default=False, action='store_true')
   runner_args, args = parser.parse_known_args()
 
   config = Config(target_os=Config.OS_ANDROID,
                   target_cpu=runner_args.target_cpu,
                   is_debug=runner_args.debug,
                   apk_name="Mandoline.apk")
   shell = AndroidShell(config)
-  args.extend(shell.PrepareShellRun(None, runner_args.device, runner_args.gdb))
-
-  shell.CleanLogs()
+  shell.InitShell(None, runner_args.device)
   p = shell.ShowLogs()
   shell.StartShell(args, sys.stdout, p.terminate, runner_args.gdb)
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(main())