- Add util.UpdaterStates - the state of SystemUpdaterSample.
It's different from status of UpdateEngine;
when UpdateEngine#cancel is used to suspend the update,
UpdateEngine sets status to IDLE, which cannot be used
to track the suspended state.
- UI: Change 'Update status' to 'Engine status'.
- UI: Change 'Update completion' to 'Engine error code'.
- UI: Add 'Updater state'.
Test: manually on the device
Test: using JUnit4
Change-Id: I9c58b5ed0eae3be7ab8b217fc01a621e8fb2f4bf
Signed-off-by: Zhomart Mukhamejanov <zhomart@google.com>