gaaclarke e70587d920 [Impeller] match rrect_blur math to the gaussian math (flutter/engine#53130) ...

fixes https://github.com/flutter/flutter/issues/149276

## before
<img width="626" alt="Screenshot 2024-05-30 at 1 29 11 PM" src="https://github.com/flutter/engine/assets/30870216/2777d55f-928f-4029-92d3-203e8ca669a0">

## after
<img width="622" alt="Screenshot 2024-05-31 at 11 07 58 AM" src="https://github.com/flutter/engine/assets/30870216/155a592c-90f0-486b-8131-2f66328a871a">

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

2024-06-03 23:43:55 +00:00

..

src/flutter

[Impeller] match rrect_blur math to the gaussian math (flutter/engine#53130)

2024-06-03 23:43:55 +00:00