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

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

Index: build/android/pylib/remote/device/appurify_sanitized.py
diff --git a/build/android/pylib/remote/device/appurify_sanitized.py b/build/android/pylib/remote/device/appurify_sanitized.py
index a75d63d7e8ed34bb765beb17866580b8a23bc038..48736d5617ff0059ed2cacf826334f6a26bd29e3 100644
--- a/build/android/pylib/remote/device/appurify_sanitized.py
+++ b/build/android/pylib/remote/device/appurify_sanitized.py
@@ -5,27 +5,30 @@
 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.