Update Service on settings changes without restarting it

[fennifith]

This would prevent crashes and have huge performance benefits. Should've done this to begin with.

• [x] icon settings
• [x] resource-based colors
• [x] default color
• [x] home screen transparency
• [x] default icon/text colors
• [x] contrasting icon/text colors
• [ ] prevent overlaps
• [ ] animation settings
• [x] transparent mode
• [x] side padding
• [x] burn-in protection