AccountManagerService: initialize cursors within try/finally block

Change-Id: I8368fa390e94f36fd9c65a34631f320247e5e33e
KeyguardHostView: move all user settings to observer...

... instead of reading them inline

Change-Id: I60e713927269464cc17fe396c647b9ddcef01a0c
Merge "AccountManagerService: initialize cursors within try/finally block" into kk44
Merge "KeyguardHostView: move all user settings to observer..." into kk44