[Android] Parallelize provision_devices.py.

build/android/pylib/device_settings.py

 # 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 logging
 
 from pylib import content_settings
 
 _LOCK_SCREEN_SETTINGS_PATH = '/data/system/locksettings.db'
 PASSWORD_QUALITY_UNSPECIFIED = '0'
@@ skipping 18 matching lines @@
     sdk_version = int(device.GetProp('ro.build.version.sdk'))
   except ValueError:
     logging.error('Skipping content settings configuration, unknown sdk %s',
                   device.GetProp('ro.build.version.sdk'))
     return
 
   if sdk_version < 16:
     logging.error('Skipping content settings configuration due to outdated sdk')
     return
 
-  device.SetProp('persist.sys.usb.config', 'adb')
-  device.old_interface.WaitForDevicePm()
-
   if device.GetProp('ro.build.type') == 'userdebug':
     for table, key_value in desired_settings:
       settings = content_settings.ContentSettings(table, device)
       for key, value in key_value:
         settings[key] = value
       logging.info('\n%s %s', table, (80 - len(table)) * '-')
       for key, value in sorted(settings.iteritems()):
         logging.info('\t%s: %s', key, value)
 
 
@@ skipping 121 matching lines @@
     ('user_rotation', 0),
   ]),
 ]
 
 NETWORK_DISABLED_SETTINGS = [
   ('settings/global', [
     ('airplane_mode_on', 1),
     ('wifi_on', 0),
   ]),
 ]