fix(android): resolve APK installation failure on Android 16

[google-labs-jules]

This PR resolves the INSTALL_PARSE_FAILED_NO_CERTIFICATES error (specifically the "Attempt to get length of null array" parsing failure) encountered when installing APKs on Android 16 (API 36).

Changes:

1. Broadened .NET 10 Native Asset Fix: Updated the FixRuntimePackAssetTypes target in osu.Android.props to include ResolvedFileToPublish. This ensures that native libraries (like BASS or local .so files) are correctly classified as native rather than managed assemblies, which prevents the package manager from crashing during certificate collection.
2. Mandatory 16KB ELF Alignment: Extended build/PatchElfPageSize.targets to automatically patch native libraries found in osu.Android/libs/. Android 16 enforces 16KB page alignment for all 64-bit ELF LOAD segments; this change ensures our custom native libraries satisfy this requirement.
3. Default Debug Signing for Workflows: Modified .github/workflows/release.yml to remove the explicit disabling of the Android KeyStore for "unsigned" builds. This allows the .NET SDK to fall back to its default debug certificate, ensuring that the generated APK is signed and installable on modern devices while still being distinguished from production-signed releases.

Verified that the modified logic correctly targets native assets and that the core project build remains stable.

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PR created automatically by Jules for task 18130573469748600972 started by @winnerspiros

[google-labs-jules]

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