- Bolt remains opaque (white) below a threshold level, otherwise
transparent.
- Draw the entire shape using a path, removing the need for a
software layer.
- Use a similar approach to make the percentage text readable,
but this still requires a software layer (since text is involved).
Bug: 12131168
Change-Id: Ifde5e99121155bf1be171f44b2c80c116b17c9e7
4b786ff4b5