Lockscreen colors [1/2]

Inspired by what SlimROMs did back in kitkat, I decided to make the lockscreen
elements themeable via the color changer

- Lockscreen bottom shortcuts
- Lockscreen lock icon
- Lockscreen clock & date
- Lockscreen indication text

Change-Id: Id1add771ff3320e2792d3a177b4e38a67cea166b
3 files changed