Revert of Enable presubmit pylint in build/android.

build/android/pylib/base/test_dispatcher.py

Index: build/android/pylib/base/test_dispatcher.py
diff --git a/build/android/pylib/base/test_dispatcher.py b/build/android/pylib/base/test_dispatcher.py
index 5f68a7ff46a648ea0685eb9ce53e5801dfa72fed..11374bbf45025bcf72d8e84ef3bf7b688dfdd7de 100644
--- a/build/android/pylib/base/test_dispatcher.py
+++ b/build/android/pylib/base/test_dispatcher.py
@@ -20,10 +20,11 @@ import threading
 
 from pylib import android_commands
 from pylib import constants
-from pylib.base import base_test_result
 from pylib.utils import reraiser_thread
 from pylib.utils import watchdog_timer
 
+import base_test_result
+
 
 DEFAULT_TIMEOUT = 7 * 60  # seven minutes
 
@@ -68,9 +69,7 @@ class _TestCollection(object):
     tests: List of tests to put in the collection.
   """
 
-  def __init__(self, tests=None):
-    if not tests:
-      tests = []
+  def __init__(self, tests=[]):
     self._lock = threading.Lock()
     self._tests = []
     self._tests_in_progress = 0