Move android buildbot test logic into python

build/android/pylib/apk_info.py

Index: build/android/pylib/apk_info.py
diff --git a/build/android/pylib/apk_info.py b/build/android/pylib/apk_info.py
index 00b30ddaaa3f803b0a8eee6609479ff8f454371c..426b9d102b351c7fb9c015a111fe2b1bfbff834d 100644
--- a/build/android/pylib/apk_info.py
+++ b/build/android/pylib/apk_info.py
@@ -5,6 +5,7 @@
 """Gathers information about APKs."""
 
 import collections
+import constants
 import logging
 import os
 import pickle
@@ -31,7 +32,8 @@ class ApkInfo(object):
   """Helper class for inspecting APKs."""
 
   def __init__(self, apk_path, jar_path):
-    self._PROGUARD_PATH = os.path.join(os.environ['ANDROID_SDK_ROOT'],
+    sdk_root = os.getenv('ANDROID_SDK_ROOT', constants.ANDROID_SDK_ROOT)
+    self._PROGUARD_PATH = os.path.join(sdk_root,
                                        'tools/proguard/bin/proguard.sh')
     if not os.path.exists(self._PROGUARD_PATH):
       self._PROGUARD_PATH = os.path.join(os.environ['ANDROID_BUILD_TOP'],