[Android] Print timestamp + threadid with provision_devices output.

build/android/provision_devices.py

Index: build/android/provision_devices.py
diff --git a/build/android/provision_devices.py b/build/android/provision_devices.py
index 44ae971876e0cb476115bde9a352271233a54ff2..110de5b99911216eac4a9f0418dfb7441af6a59c 100755
--- a/build/android/provision_devices.py
+++ b/build/android/provision_devices.py
@@ -24,6 +24,7 @@ from pylib import device_settings
 from pylib.device import device_blacklist
 from pylib.device import device_errors
 from pylib.device import device_utils
+from pylib.utils import run_tests_helper
 
 sys.path.append(os.path.join(constants.DIR_SOURCE_ROOT,
                              'third_party', 'android_testrunner'))
@@ -255,7 +256,10 @@ def ProvisionDevices(options):
 
 
 def main(argv):
-  logging.basicConfig(level=logging.INFO)
+  custom_handler = logging.StreamHandler(sys.stdout)
+  custom_handler.setFormatter(run_tests_helper.CustomFormatter())
+  logging.getLogger().addHandler(custom_handler)
+  logging.getLogger().setLevel(logging.INFO)
 
   parser = optparse.OptionParser()
   parser.add_option('--skip-wipe', action='store_true', default=False,