android: Don't require aapt to be on the path during builds and tests.

build/android/pylib/instrumentation/test_package.py

 # Copyright (c) 2013 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.
 
 """Class representing instrumentation test apk and jar."""
 
 import os
 
+from pylib import constants
 from pylib.instrumentation import test_jar
 from pylib.utils import apk_helper
 
 
 class TestPackage(test_jar.TestJar):
   def __init__(self, apk_path, jar_path):
     test_jar.TestJar.__init__(self, jar_path)
 
     if not os.path.exists(apk_path):
       raise Exception('%s not found, please build it' % apk_path)
     self._apk_path = apk_path
     self._apk_name = os.path.splitext(os.path.basename(apk_path))[0]
-    self._package_name = apk_helper.GetPackageName(self._apk_path)
+    self._package_name = apk_helper.GetPackageName(constants.ANDROID_SDK_TOOLS,
+                                                   self._apk_path)
 
   def GetApkPath(self):
     """Returns the absolute path to the APK."""
     return self._apk_path
 
   def GetApkName(self):
     """Returns the name of the apk without the suffix."""
     return self._apk_name
 
   def GetPackageName(self):
     """Returns the package name of this APK."""
     return self._package_name
 
   # Override.
   def Install(self, adb):
     adb.ManagedInstall(self.GetApkPath(), package_name=self.GetPackageName())