Fix recover device before last retry when 0 retries is specified

This fix the attempt to recover device when `--num_retries=0` is
specified locally

Change-Id: Ie73a62afd13835dbdd3f18716bc3a2ea0ca59434
Reviewed-on: https://chromium-review.googlesource.com/726848
Commit-Queue: Yoland Yan <yolandyan@chromium.org>
Reviewed-by: Benjamin Pastene <bpastene@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509935}

build/android/pylib/local/device/local_device_test_run.py

@@ -105,7 +105,7 @@ class LocalDeviceTestRun(test_run.TestRun):
         results = []
         while tries < self._env.max_tries and tests:
           logging.info('STARTING TRY #%d/%d', tries + 1, self._env.max_tries)
-          if tries + 1 == self._env.max_tries:
+          if tries > 0 and tries + 1 == self._env.max_tries:
             logging.info(
                 'Attempting to recover devices prior to last test attempt.')
             self._env.parallel_devices.pMap(device_recovery.RecoverDevice, None)