Enable presubmit pylint in build/android.

build/android/PRESUBMIT.py

Index: build/android/PRESUBMIT.py
diff --git a/build/android/PRESUBMIT.py b/build/android/PRESUBMIT.py
index d8e5ae34bb4e1d4a53f8e67b01c262a653f369af..85a1eda20d83b42f7c2bdf734a40f4616db06272 100644
--- a/build/android/PRESUBMIT.py
+++ b/build/android/PRESUBMIT.py
@@ -35,10 +35,13 @@ def CommonChecks(input_api, output_api):
     """Returns a path relative to presubmit directory."""
     return input_api.os_path.join(input_api.PresubmitLocalPath(), *dirs)
 
+  # F0401 is issued when pylint can't import a module, but it doesn't seem to
+  # work correctly on our scripts.
   output.extend(input_api.canned_checks.RunPylint(
       input_api,
       output_api,
-      white_list=[r'PRESUBMIT\.py$', r'buildbot/.*\.py$'],
+      white_list=[r'.*\.py$'],
+      black_list=[r'pylib/android_commands\.py$'],
       extra_paths_list=[
           J(), J('..', '..', 'third_party', 'android_testrunner'),
           J('buildbot')]))