Enable presubmit pylint in build/android.

build/android/pylib/base/test_dispatcher_unittest.py

Index: build/android/pylib/base/test_dispatcher_unittest.py
diff --git a/build/android/pylib/base/test_dispatcher_unittest.py b/build/android/pylib/base/test_dispatcher_unittest.py
index c6078dbdfcfca6f0bb433067139f8158cd181920..fc01bc4b7c2a25741ae5305d807a1dd1c83bea79 100644
--- a/build/android/pylib/base/test_dispatcher_unittest.py
+++ b/build/android/pylib/base/test_dispatcher_unittest.py
@@ -17,8 +17,8 @@ android_commands.GetAttachedDevices = lambda: ['0', '1']
 from pylib import constants
 from pylib.utils import watchdog_timer
 
-import base_test_result
-import test_dispatcher
+from . import base_test_result
+from . import test_dispatcher
 
 
 class TestException(Exception):
@@ -191,7 +191,7 @@ class TestShard(unittest.TestCase):
     android_commands.GetAttachedDevices = lambda: []
     try:
       with self.assertRaises(AssertionError):
-        results, exit_code = TestShard._RunShard(MockRunner)
+        _results, _exit_code = TestShard._RunShard(MockRunner)
     finally:
       android_commands.GetAttachedDevices = attached_devices