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

build/android/pylib/instrumentation/test_package.py

Index: build/android/pylib/instrumentation/test_package.py
diff --git a/build/android/pylib/instrumentation/test_package.py b/build/android/pylib/instrumentation/test_package.py
index 79b2fc9737f6346fc9f9bf94a924946d8a93d044..b9309548548bb29c559aec58be47e1c4e79f1f20 100644
--- a/build/android/pylib/instrumentation/test_package.py
+++ b/build/android/pylib/instrumentation/test_package.py
@@ -6,6 +6,7 @@
 
 import os
 
+from pylib import constants
 from pylib.instrumentation import test_jar
 from pylib.utils import apk_helper
 
@@ -18,7 +19,8 @@ class TestPackage(test_jar.TestJar):
       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."""