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

build/android/pylib/remote/device/appurify_sanitized.py

 # Copyright 2014 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 contextlib
 import logging
 import os
-import sys
 
-from pylib import constants
+from pylib.constants import host_paths
 
-sys.path.append(os.path.join(
-    constants.DIR_SOURCE_ROOT, 'third_party', 'requests', 'src'))
-sys.path.append(os.path.join(
-    constants.DIR_SOURCE_ROOT, 'third_party', 'appurify-python', 'src'))
-handlers_before = list(logging.getLogger().handlers)
+_REQUESTS_PATH = os.path.join(
+    host_paths.DIR_SOURCE_ROOT, 'third_party', 'requests', 'src')
+_APPURIFY_PYTHON_PATH = os.path.join(
+    host_paths.DIR_SOURCE_ROOT, 'third_party', 'appurify-python', 'src')
 
-import appurify.api # pylint: disable=import-error
-import appurify.utils # pylint: disable=import-error
+with host_paths.SysPath(_REQUESTS_PATH), (
+     host_paths.SysPath(_APPURIFY_PYTHON_PATH)):
 
-handlers_after = list(logging.getLogger().handlers)
-new_handler = list(set(handlers_after) - set(handlers_before))
-while new_handler:
-  logging.info("Removing logging handler.")
-  logging.getLogger().removeHandler(new_handler.pop())
+  handlers_before = list(logging.getLogger().handlers)
 
-api = appurify.api
-utils = appurify.utils
+  import appurify.api # pylint: disable=import-error
+  import appurify.utils # pylint: disable=import-error
+
+  handlers_after = list(logging.getLogger().handlers)
+  new_handler = list(set(handlers_after) - set(handlers_before))
+  while new_handler:
+    logging.info("Removing logging handler.")
+    logging.getLogger().removeHandler(new_handler.pop())
+
+  api = appurify.api
+  utils = appurify.utils
 
 # This is not thread safe. If multiple threads are ever supported with appurify
 # this may cause logging messages to go missing.
 @contextlib.contextmanager
 def SanitizeLogging(verbose_count, level):
   if verbose_count < 2:
     logging.disable(level)
     yield True
     logging.disable(logging.NOTSET)
   else:
     yield False