SystemUI: Redo circle battery style

- Now shows up on QuickSettings panel.
- Fixes issues with battery circle style on theme and
  ui mode change and statusbar icon toggle.
- Fixes wrong tint color with circle battery icon.
- Re-evaluating system theme to avoid delay in circle
  battery tint color change.

Change-Id: Id90f85e47ce4b9811e9bb67b91169997020300d8