Refactor acloud.public.errors to acloud.errors.

Bug: 113753798
Test: atest acloud_test && run acloud create/list/delete
Change-Id: I03b4b34769d754bfebd279895b0ca44311bbecc7
diff --git a/public/acloud_main.py b/public/acloud_main.py
index 264560b..780a61d 100644
--- a/public/acloud_main.py
+++ b/public/acloud_main.py
@@ -59,6 +59,7 @@
 OAUTH2_LOGGER.addHandler(logging.FileHandler("/dev/null"))
 
 # pylint: disable=wrong-import-position
+from acloud import errors
 from acloud.create import create
 from acloud.create import create_args
 from acloud.delete import delete
@@ -72,7 +73,6 @@
 from acloud.public import acloud_common
 from acloud.public import config
 from acloud.public import device_driver
-from acloud.public import errors
 from acloud.public.actions import create_cuttlefish_action
 from acloud.public.actions import create_goldfish_action
 from acloud.setup import setup