[android] Make chromium.gpu.fyi bots use devil adb throughout.

scripts/slave/recipe_modules/chromium_android/config.py

 # Copyright 2013 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 types
 
 from recipe_engine.config import config_item_context, ConfigGroup
 from recipe_engine.config import ConfigList, Dict, List, Single, Static
 from recipe_engine.config_types import Path
 
@@ skipping 26 matching lines @@
     coverage = Single(bool, required=False, empty_val=False),
     chrome_specific_wipe = Single(bool, required=False, empty_val=False),
     incremental_coverage = Single(bool, required=False, empty_val=False),
     env = ConfigGroup(
       LLVM_FORCE_HEAD_REVISION = Single(basestring, required=False),
     ),
     gce_setup = Single(bool, required=False, empty_val=False),
     gce_snapshot = Single(basestring, required=False),
     gce_count = Single(int, required=False),
     restart_usb = Single(bool, required=False, empty_val=False),
+    use_devil_adb = Single(bool, required=False, empty_val=False),
   )
 
 
 config_ctx = config_item_context(BaseConfig)
 
 @config_ctx(is_root=True)
 def base_config(c):
   c.internal_dir_name = 'clank'
   c.test_runner = c.CHECKOUT_PATH.join('build', 'android', 'test_runner.py')
 
@@ skipping 169 matching lines @@
 def chromium_perf(c):
   pass
 
 @config_ctx()
 def cast_builder(c):
   pass
 
 @config_ctx()
 def restart_usb(c):
   c.restart_usb = True
+
+@config_ctx()
+def use_devil_adb(c):
+  c.use_devil_adb = True