aosp: fix fstatat() calls for android asset paths

[rogerzanoni]

Routes fstatat(AT_FDCWD, ..., flag == 0) for Android asset paths
through the __wrap_stat implementation.

Fixes the following issues in multiple tests:
asset_manager.cc: Asset path not found

Bug: 532068409

[github-actions]

🤖 Gemini Suggested Commit Message

---

android: Fix fstatat calls for asset paths

Update the Starboard modular POSIX layer to handle Android asset
paths during stat operations. Musl's stat implementation relies on
fstatat, which does not natively support asset paths. By routing
these calls through the Android-specific stat wrapper, asset
resolution is correctly maintained for modular builds.

Issue: 11212

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[gemini-code-assist]

Code Review

This pull request modifies __abi_wrap_fstatat in starboard_layer_posix_stat_abi_wrappers.cc to route Android asset path stat calls through stat under specific conditions. The review feedback points out a typo in a comment and an outdated closing brace comment that does not match the actual conditional logic.

[andrewsavage1]

It looks like this customization should happen in android's posix_emu directory instead of being across all platforms

[rogerzanoni]

Actually, already fixed by f2a15b9