Halo Custom Colors: Circle Color

As I'm not satisfied with the way other ROMs change the halo circle color, I implemented it myself.
This way, not just the circle color with the notification icon on it changes, but also the dismiss, hide etc. background changes. I'll try to implement the bubble (text) color as well, when I have time...
Small fix for the commit below
Make HALO Colors compatible with themes + add HALO Effect Color (1/2)
Forgot to include these files to commit below
Halo Colors: Add Notification Title/Description Color (1/2)

This was probably by far the most difficult color to implement. I'm still not sure, whether my implementation is "good style". Maybe you have a better idea how to change the title/description color?
Remove debugging message from commit below