Remove references to psutil.error in Android Buildbot scripts

The error module is not a part of psutil's API and it has been moved
to _error in recent releases. The exceptions in psutil are supposed to
be accessed directly from the top level module.

BUG=406396
[email protected]

Review URL: https://codereview.chromium.org/497763002

Cr-Commit-Position: refs/heads/master@{#300724}
diff --git a/AUTHORS b/AUTHORS
index 76f866b..1cc60ec 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -19,6 +19,7 @@
 Aditya Bhargava <[email protected]>
 Ajay Berwal <[email protected]>
 Ajith Kumar V <[email protected]>
+Aku Kotkavuo <[email protected]>
 Alex Gartrell <[email protected]>
 Alex Henrie <[email protected]>
 Alex Scheele <[email protected]>