Fix padding to match Material guidelines

- Also move header info to strings.xml
- Fix issue when no states file found

Change-Id: I5fb1f6a961bf9525d90ac2eaa2048ebb56daec06
Signed-off-by: Rob Beane <robbeane@gmail.com>
Rearrange home_layout and fix xml formatting

- Move 'Total State Time' above 'Unused CPU States'

Change-Id: I9094451dc54dfb253a372b6fdf9782d84536ca7c
Signed-off-by: Rob Beane <robbeane@gmail.com>