Make DrawPath/DrawPaint/DrawVertices work for solid color/texture/gradients. Update 10/2022: [Design doc](https://docs.google.com/document/d/1t-dzzi04nCdkIReoJp8ZyGNskqIip1TG3WhGEz7Osd8)