- Enable more UpdaterState transitions. - MainActivity: Improve UI states. - UpdateManager: fix status handling errors, add suspend/resume methods. Add "synchronize this" to public control (suspend, cancel, ..) methods. - Add several UpdateManager tests. Test: on device Test: JUnit4 Change-Id: Id7f85dfaa466fa0d6136eee39e9fd7658278c616 Signed-off-by: Zhomart Mukhamejanov <zhomart@google.com>