[Android] Prepare build/android/ for catapult+devil.

BUG=476719

Review URL: https://codereview.chromium.org/1571803002

Cr-Commit-Position: refs/heads/master@{#368599}
diff --git a/build/android/buildbot/bb_device_steps.py b/build/android/buildbot/bb_device_steps.py
index e4d2998b..f52c24b9 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -17,6 +17,7 @@
 import bb_annotations
 
 sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+import devil_chromium
 import provision_devices
 from devil.android import device_utils
 from pylib import constants
@@ -742,6 +743,8 @@
   parser = GetDeviceStepsOptParser()
   options, args = parser.parse_args(argv[1:])
 
+  devil_chromium.Initialize()
+
   if args:
     return sys.exit('Unused args %s' % args)