Fix custom-font ellipsis clipping on Android

[gotbora]

Summary:
This fixes two Android Text bugs.

Problem 1: tail ellipsis clipped with custom fonts

Android generates the tail ellipsis outside styled text spans, shaping it with ReactTextView's own paint. That paint did not carry the base text attributes React Native measured with — typeface, font size, letter spacing, font feature settings, or shaping flags. For custom fonts the ellipsis glyph can be wider than the reserved space, overflowing the text bounds and losing its last dot under overflow: hidden.

Problem 2: fontVariant ignored without fontFamily

fontVariant (small-caps, oldstyle-nums, lining-nums, tabular-nums, proportional-nums, …) is applied through CustomStyleSpan, but TextLayoutManager only added that span when fontFamily, fontWeight, fontStyle or fontVariationSettings was also set. A Text (or nested fragment) that set only fontVariant rendered without the requested OpenType features.

Fix

• Add a CustomStyleSpan whenever fontFeatureSettings is set, in both span-building paths, so fontVariant works on its own. This changes the RNTester fontVariants example on Android.
• Apply the resolved base TextAttributeProps to the view's paint before setting text, using the same TextLayoutManager.updateTextPaint that already builds the measurement paint. updateTextPaint now also applies letter spacing, font feature settings and shaping flags. A shared resetTextPaint clears the state when a view is recycled.
• PreparedLayout now carries its baseTextAttributes, so selectable text (which still renders through ReactTextView with prepared layouts enabled) gets the correct paint.

Changelog:
[Android][Fixed] - Fix tail ellipsis overflowing or clipping on Text with a custom font
[Android][Fixed] - Fix fontVariant being ignored on Text that doesn't also set fontFamily, fontWeight or fontStyle

Reviewed By: Abbondanzo

Differential Revision: D116515542

[meta-codesync]

@gotbora has exported this pull request. If you are a Meta employee, you can view the originating Diff in D116515542.

[meta-codesync]

This pull request has been merged in ababa4d.