Enable presubmit pylint in build/android.

build/android/findbugs_diff.py

Index: build/android/findbugs_diff.py
diff --git a/build/android/findbugs_diff.py b/build/android/findbugs_diff.py
index eb117da36cfe02ccca20efa2c4316e4f477cab00..e8678a3ef35790379d3dc1dafb70b68c7cfd7ca4 100755
--- a/build/android/findbugs_diff.py
+++ b/build/android/findbugs_diff.py
@@ -24,7 +24,6 @@ Run
 
 """
 
-import optparse
 import os
 import sys
 
@@ -32,10 +31,10 @@ from pylib import constants
 from pylib.utils import findbugs
 
 
-def main(argv):
+def main():
   parser = findbugs.GetCommonParser()
 
-  options, _ = parser.parse_args()
+  options, _args = parser.parse_args()
 
   if not options.base_dir:
     options.base_dir = os.path.join(constants.DIR_SOURCE_ROOT, 'build',
@@ -47,4 +46,4 @@ def main(argv):
 
 
 if __name__ == '__main__':
-  sys.exit(main(sys.argv))
+  sys.exit(main())