More UI tweaks and fixes.

* Actually post the correct message every 5 second for the progress bar.
* Update the text for the settings to a more finalish version.
* Check the battery status before allowing encryption to proceed.
* Display a place holder message if no password is set for the device.

Change-Id: I2734300c9a81467dbd0401427d8b656922ab4819
3 files changed