Fix GH-41226 by suppressing path adjustment when not actually drawing a border (#46239)

Summary:
When not drawing a border, the mGapBetweenPaths adjustment can create noticable pixelation when drawing curves through a low number of pixels.  This is noticable mostly on buttons and such on low-dpi devices.  This fix only applies the fix if clipping for the border radius is done.

When drawing small radius rounded backgrounds (e.g. to draw a circle or button) we see visible pixelation (see [GH-41226](https://github.com/facebook/react-native/issues/41226)) This is particularly noticable on low DPI devices.

[ANDROID] [FIXED] - Don't use mGapBetweenPaths if not drawing a border

Pull Request resolved: https://github.com/facebook/react-native/pull/46239

Test Plan:
Built an android app that directly uses CSSBackgroundDrawable to draw a background and verified repro of this issue.
![pre-fix](https://github.com/user-attachments/assets/e56a41b1-60f6-4953-9e91-b95a3380f2d7)
Then modified the code according to this PR and verified that anti-aliasing is appropriately applied
![fix](https://github.com/user-attachments/assets/b6b1aecf-a713-4e0a-9759-82c2dd862991)

Reviewed By: NickGerleman

Differential Revision: D61925281

Pulled By: jorge-cab

fbshipit-source-id: 93014629d031bd0d716cd3bb11e2c294dedad639