[android] Propagate exit codes from update_third_party_deps.

Bug: 766773
Change-Id: I4f1ea649f4b2904fb0c30793c840afc63d5ec177
Reviewed-on: https://chromium-review.googlesource.com/753129
Reviewed-by: Benjamin Pastene <bpastene@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#513960}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f806d496435126ab581701f098eb92a293932469

android/update_deps/update_third_party_deps.py

@@ -77,7 +77,7 @@ def Upload(arguments):
   bucket_url, local_path = _CheckPaths(arguments.bucket_path,
                                        arguments.local_path)
   file_list = _CheckFileList(local_path, arguments.file_list)
-  upload_to_google_storage.upload_to_google_storage(
+  return upload_to_google_storage.upload_to_google_storage(
       input_filenames=file_list,
       base_url=bucket_url,
       gsutil=arguments.gsutil,
@@ -93,7 +93,7 @@ def Download(arguments):
   bucket_url, local_path = _CheckPaths(arguments.bucket_path,
                                        arguments.local_path)
   _PurgeSymlinks(local_path)
-  download_from_google_storage.download_from_google_storage(
+  return download_from_google_storage.download_from_google_storage(
       local_path,
       bucket_url,
       gsutil=arguments.gsutil,