Fix Android inline Text views with small font scale

[TorinAsakura]

Summary:

Fixes #50916.
Closes torin-asakura/workspace#126.

Android inline views inside Text receive their measured layout size from Fabric as layout units/DIP. TextLayoutManager was converting those attachment dimensions with PixelUtil.toPixelFromSP(...), so a device font scale below 1.0 shrank the inline view placeholder width. In the #50916 RNTester reproducer, a measured Row cutoff attachment around 155px became about 132px at font_scale=0.85, clipping the rendered text to Row.

This changes inline text attachment dimensions to use DIP conversion and rounds them up to the pixel grid in both spannable construction paths.

Changelog:

[ANDROID] [FIXED] - Keep inline views inside Text from shrinking with Android system font scale

Test Plan:

./gradlew :packages:react-native:ReactAndroid:testDebugUnitTest --tests com.facebook.react.views.text.TextLayoutManagerInlineViewSizeTest -Preact.internal.useHermesNightly=false

./gradlew :packages:rn-tester:android:app:assembleDebug -Preact.internal.useHermesStable=true -PreactNativeArchitectures=arm64-v8a

Installed RNTester on an Android API 36 arm64 emulator, set font_scale=0.85, and checked Text > Inline view with small font scale.

Visual evidence:

Before

After

[cipolleschi]

Thanks for the contribution

[meta-codesync]

@cipolleschi has imported this pull request. If you are a Meta employee, you can view this in D108030457.

[cortinico]

Review automatically exported from Phabricator review in Meta.

[TorinAsakura]

Review automatically exported from Phabricator review in Meta.

Hi! I see the exported changes requested review from Phabricator, but there are no public review threads or actionable comments visible on GitHub. Is there anything I should change on my side, or is the PR only blocked by internal Meta checks?

[cortinico]

Hi! I see the exported changes requested review from Phabricator, but there are no public review threads or actionable comments visible on GitHub. Is there anything I should change on my side, or is the PR only blocked by internal Meta checks?

Yes I've asked @cipolleschi to do one change + can you add one test case for this inside RNTester?

Specifically it would be gold if you could provide before/after screenshots of that test case inside RNTester for reference.

Thank you

[TorinAsakura]

can you add one test case for this inside RNTester?
Specifically it would be gold if you could provide before/after screenshots of that test case inside RNTester for reference.

Added the RNTester case under Text > Inline view with small font scale.

Change: 9d2f6d8

Also updated the PR body with proofs.

Before

After