swarming: Enable USB resets in python-adb on the staging instance.

appengine/swarming/swarming_bot/api/platforms/android.py

 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Android specific utility functions.
 
 This file serves as an API to bot_config.py. bot_config.py can be replaced on
 the server to allow additional server-specific functionality.
 """
 
@@ skipping 91 matching lines @@
   ]
 
 
 def initialize(pub_key, priv_key):
   return high.Initialize(pub_key, priv_key)
 
 
 def get_devices(bot, endpoints=None):
   devices = []
   if not gce.is_gce():
+    # TODO(bpastene) Remove this check and all associated logic after
+    # experiment from crbug.com/642440 is complete.
+    enable_resets = bot.server and '-dev' in bot.server

[bpastene, 2016/10/07 22:57:58]

Anyone know a better is_staging check?

[ghost stip (do not use), 2016/10/07 23:50:26]

IIRC this is correct but double-check with maruel

[M-A Ruel, 2016/10/11 19:34:02]

Make it a flag, use bot_config.is_staging() to pass this flag. Add the function
back, it was removed in https://chromereviews.googleplex.com/491247013.

[bpastene, 2016/10/11 20:09:53]

Done: https://chromereviews.googleplex.com/519447013/

     devices += high.GetLocalDevices(
       'swarming', 10000, 10000, on_error=bot.post_error if bot else None,
-      as_root=False)
+      as_root=False, enable_resets=enable_resets)
 
   if endpoints:
     devices += high.GetRemoteDevices(
         'swarming', endpoints, 10000, 10000,
         on_error=bot.post_error if bot else None, as_root=False)
 
   return devices
 
 
 def close_devices(devices):
   return high.CloseDevices(devices)
 
 
 def kill_adb():
   return adb_commands_safe.KillADB()