[Android][telemetry] Update pylib imports for modules that moved into devil.

build/android/screenshot.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 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.
 
 """Takes a screenshot or a screen video capture from an Android device."""
 
 import logging
 import optparse
 import os
 import sys
 
+from devil.android import device_blacklist
+from devil.android import device_errors
+from devil.android import device_utils
 from pylib import screenshot
-from pylib.device import device_blacklist
-from pylib.device import device_errors
-from pylib.device import device_utils
 
 def _PrintMessage(heading, eol='\n'):
   sys.stdout.write('%s%s' % (heading, eol))
   sys.stdout.flush()
 
 
 def _CaptureScreenshot(device, host_file):
   host_file = device.TakeScreenshot(host_file)
   _PrintMessage('Screenshot written to %s' % os.path.abspath(host_file))
 
@@ skipping 68 matching lines @@
 
   if options.video:
     _CaptureVideo(device, host_file, options)
   else:
     _CaptureScreenshot(device, host_file)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())