Fix progress bar display when returning back to activity while download
is running.

Decouple UpdatePreference from UpdatesSettings in the process.
Also fix UI handling if MD5 sum didn't match.

Change-Id: Ib50486e3722fdf335b78e683d09154e955dc7c23
CMUpdater: SK Translations

Change-Id: I8bc29c1509a045d009a762bac4f75c2ebf6385a7
Merge remote-tracking branch 'cm/cm-10.1'; commit 'HEAD' into HEAD