| Added `SkStrikeRef`, a public lightweight handle to a resolved font strike. | |
| `SkFont::makeStrikeRef()` returns an `SkStrikeRef` that allows repeated glyph | |
| metric queries (advances, bounds) without the per-call overhead of strike | |
| lookup. This is useful for text shaping engines that make many `getWidths` | |
| calls with the same font configuration. |