[Android] Converts host driven tests to common test_dispatcher

build/android/pylib/utils/run_tests_helper.py

Index: build/android/pylib/utils/run_tests_helper.py
diff --git a/build/android/pylib/utils/run_tests_helper.py b/build/android/pylib/utils/run_tests_helper.py
index 60823fcd4cd657c8a7dd3720fc3e199059cf1e57..6cb1f9d8851bc1113fa5a119b8839c312b31dec1 100644
--- a/build/android/pylib/utils/run_tests_helper.py
+++ b/build/android/pylib/utils/run_tests_helper.py
@@ -2,10 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""Helper functions common to native, java and python test runners."""
+"""Helper functions common to native, java and host-driven test runners."""
 
 import logging
-import os
 import sys
 import time
 
@@ -13,14 +12,14 @@ import time
 class CustomFormatter(logging.Formatter):
   """Custom log formatter."""
 
-  #override
+  # override
   def __init__(self, fmt='%(threadName)-4s  %(message)s'):
     # Can't use super() because in older Python versions logging.Formatter does
     # not inherit from object.
     logging.Formatter.__init__(self, fmt=fmt)
     self._creation_time = time.time()
 
-  #override
+  # override
   def format(self, record):
     # Can't use super() because in older Python versions logging.Formatter does
     # not inherit from object.