Update chromium.android.json

BUG=637213
NOTRY=True
TBR=jbudorick@chromium.org

Review-Url: https://codereview.chromium.org/2240923002
Cr-Original-Commit-Position: refs/heads/master@{#411749}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: aa986de5b33958a7f4fbf27c5d1a8a5c50ac4c0f

android/test_wrapper/logdog_wrapper.py

@@ -57,8 +57,9 @@ def main():
                 '-service-account-json', args.service_account_json,
                 'stream', '-source', args.source,
                 '-stream', '-name=%s' % args.name]
-  subprocess.call(logdog_cmd)
-  logging.info('Logcats are located at: %s', url)
+  if os.path.exists(args.logdog_bin_cmd):
+    subprocess.call(logdog_cmd)
+    logging.info('Logcats are located at: %s', url)
   return result