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

build/android/pylib/utils/findbugs.py

 # 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.
 
 import logging
 import os
 import xml.dom.minidom
 
 from devil.utils import cmd_helper
 from pylib import constants
+from pylib.constants import host_paths
 
 
-_FINDBUGS_HOME = os.path.join(constants.DIR_SOURCE_ROOT, 'third_party',
+_FINDBUGS_HOME = os.path.join(host_paths.DIR_SOURCE_ROOT, 'third_party',
                               'findbugs')
 _FINDBUGS_JAR = os.path.join(_FINDBUGS_HOME, 'lib', 'findbugs.jar')
 _FINDBUGS_MAX_HEAP = 768
 _FINDBUGS_PLUGIN_PATH = os.path.join(
-    constants.DIR_SOURCE_ROOT, 'tools', 'android', 'findbugs_plugin', 'lib',
+    host_paths.DIR_SOURCE_ROOT, 'tools', 'android', 'findbugs_plugin', 'lib',
     'chromiumPlugin.jar')
 
 
 def _ParseXmlResults(results_doc):
   warnings = set()
   for en in (n for n in results_doc.documentElement.childNodes
              if n.nodeType == xml.dom.Node.ELEMENT_NODE):
     if en.tagName == 'BugInstance':
       warnings.add(_ParseBugInstance(en))
   return warnings
@@ skipping 116 matching lines @@
     _, raw_out, stderr = cmd_helper.GetCmdStatusOutputAndError(cmd)
     results_doc = xml.dom.minidom.parseString(raw_out)
 
   for line in stderr.splitlines():
     logging.debug('  %s', line)
 
   current_warnings_set = _ParseXmlResults(results_doc)
 
   return (' '.join(cmd), current_warnings_set)