Enable presubmit pylint in build/android.

build/android/pylib/linker/test_runner.py

Index: build/android/pylib/linker/test_runner.py
diff --git a/build/android/pylib/linker/test_runner.py b/build/android/pylib/linker/test_runner.py
index 3b4ee5cb3d0023353c65c40e5b7ce46b3cc02b1c..b9eb0b4ea3f76df68eec17f7b81fe8aafc0fc9ad 100644
--- a/build/android/pylib/linker/test_runner.py
+++ b/build/android/pylib/linker/test_runner.py
@@ -7,16 +7,14 @@
 import logging
 import os.path
 import sys
-import time
 import traceback
 
 from pylib import constants
 from pylib.base import base_test_result
 from pylib.base import base_test_runner
+from pylib.linker import test_case
 from pylib.utils import apk_helper
 
-import test_case
-
 
 # Name of the Android package to install for this to work.
 _PACKAGE_NAME = 'ContentLinkerTest'