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

build/android/devil_chromium.py

Index: build/android/devil_chromium.py
diff --git a/build/android/devil_chromium.py b/build/android/devil_chromium.py
index c7142ed63a0200ec1c8d59e90661b2bc7471bf8b..8472f659bdcfd1881f9bbff155f524236cbeec8d 100644
--- a/build/android/devil_chromium.py
+++ b/build/android/devil_chromium.py
@@ -5,9 +5,14 @@
 """Configures devil for use in chromium."""
 
 import os
+import sys
 
-from devil import devil_env
+from pylib.constants import host_paths
+
+if host_paths.DEVIL_PATH not in sys.path:
+  sys.path.append(host_paths.DEVIL_PATH)
 
+from devil import devil_env
 
 _DEVIL_CONFIG = os.path.abspath(
     os.path.join(os.path.dirname(__file__), 'devil_chromium.json'))
@@ -126,6 +131,7 @@ def Initialize(output_directory=None, custom_deps=None):
     'dependencies': {},
   }
   if output_directory:
+    output_directory = os.path.abspath(output_directory)
     devil_dynamic_config['dependencies'] = {
       dep_name: {
         'file_info': {