fix(android): don't tint the whole pager when it takes keyboard focus

[youchi1]

Summary

Fixes #1151.

On Android 8+, after a TextInput inside a PagerView blurs while a hardware keyboard is in use, Android gives focus to ViewPager2's internal RecyclerView and draws its default focus highlight over every page. The result is a grey tint (about 7.5 % black) that stays until another view takes focus.

This PR turns off the default focus highlight on that RecyclerView (API 26+). The view stays focusable, so keyboard navigation does not change, and page children keep their own focus highlight.

Impact: Android only, PagerViewViewManager.createViewInstance (one import and three lines of code).

Test Plan

What's required for testing (prerequisites)?

An Android 8+ emulator (its host keyboard is a hardware keyboard) or a device with a hardware keyboard, and a PagerView page with a TextInput (snippet in #1151).

What are the steps to reproduce (after prerequisites)?

1. Tap the TextInput, type with the hardware keyboard, then press Enter. With adb: adb shell input text hello, then adb shell input keyevent KEYCODE_ENTER.
2. Before this change: the whole pager turns grey, and adb shell dumpsys window | grep mInTouchMode prints mInTouchMode=false.
3. After this change: no tint. The RecyclerView still takes focus, so only the highlight changes.

We verified this exact change in our app as a patch on 8.0.4 (React Native 0.81.5, New Architecture, Android 17 emulator). After Enter, the page keeps its colors (#FBF6F0 background, #FFFFFF field). Before the change they were #E8E4DE and #ECECEC. We did not build this repo's example app.

Compatibility

OS	Implemented
iOS	N/A
Android	✅

Checklist

• I have tested this on a device and a simulator (Android emulator only)
• I added the documentation in README.md (not needed)
• I updated the typed files (TS and Flow) (not needed)

🤖 Generated with Claude Code

[troZee]

Hello 👋
Thank you for your contribution. Could you test whether this issue exists on the main branch as well?

[Copilot]

Copilot review overview

🟢 Approval recommended

The focused, API-gated change directly addresses the documented Android behavior without altering keyboard navigation.

Review effort: Balanced
Findings: None

What changed in this PR

Disables Android’s default focus highlight on ViewPager2’s internal RecyclerView to prevent whole-page tinting after keyboard focus changes.

Changes:

• Adds an API 26+ guard.
• Disables the RecyclerView’s default focus highlight without changing focus behavior.

File	Description
android/​src/​main/​java/​com/​reactnativepagerview/​PagerViewViewManager.kt	Applies the Android focus-highlight fix during pager creation.

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[youchi1]

Hello 👋 Thank you for your contribution. Could you test whether this issue exists on the main branch as well?

oh sorry, don't know why claude opened it for non-master branch, I was testing it on the latest package version.

[youchi1]

Closing: we moved to v9, which does not have this bug.

[troZee]

I will reopen that and merge it for 8.x version in my free time