kiosk: Do update check during launch.

- Check app update during launching;
- Update cached app data when app is installed/updated;

BUG=330713
R=tengs@chromium.org

Review URL: https://codereview.chromium.org/137343003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244632 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244632