Refactor acloud.public.errors to acloud.errors.

Bug: 113753798
Test: atest acloud_test && run acloud create/list/delete
Change-Id: I03b4b34769d754bfebd279895b0ca44311bbecc7
diff --git a/internal/lib/android_compute_client.py b/internal/lib/android_compute_client.py
index 9dde2c8..ebd5481 100755
--- a/internal/lib/android_compute_client.py
+++ b/internal/lib/android_compute_client.py
@@ -37,9 +37,9 @@
 import os
 import uuid
 
+from acloud import errors
 from acloud.internal.lib import gcompute_client
 from acloud.internal.lib import utils
-from acloud.public import errors
 
 logger = logging.getLogger(__name__)
 
@@ -226,7 +226,7 @@
             utils.VerifyRsaPubKey(rsa)
         return rsa
 
-    # pylint: disable=too-many-locals
+    # pylint: disable=too-many-locals,arguments-differ
     def CreateInstance(self,
                        instance,
                        image_name,