[Android] Add a custom pylintrc for build/android/.

build/android/pylib/instrumentation/test_jar.py

Index: build/android/pylib/instrumentation/test_jar.py
diff --git a/build/android/pylib/instrumentation/test_jar.py b/build/android/pylib/instrumentation/test_jar.py
index c31dae1f17471d115722642cee15eaa0b629a66f..9944bd1f8147b91c76dc83320a02c00c2e15c136 100644
--- a/build/android/pylib/instrumentation/test_jar.py
+++ b/build/android/pylib/instrumentation/test_jar.py
@@ -13,7 +13,6 @@ import sys
 
 from devil.android import device_utils
 from devil.android import md5sum
-from devil.utils import cmd_helper
 from pylib import constants
 from pylib.utils import proguard
 
@@ -120,7 +119,7 @@ class TestJar(object):
   def GetTestAnnotations(self, test):
     """Returns a list of all annotations for the given |test|. May be empty."""
     if not self._IsTestMethod(test) or not test in self._test_methods:
-      return []
+      return {}
     return self._test_methods[test]['annotations']
 
   @staticmethod