build: publish mobile beta 1.9.1-beta.2

[Priveetee]

Beta update for server compatibility, recommendations, and playback feedback.

• Allow explicitly trusted HTTP URLs for self-hosted instances.
• Expose server-advertised recommendation settings and avoid unsupported recommendation requests.
• Keep fullscreen gestures within safe areas.
• Classify malformed media responses as delivery failures and redact provider media handles in diagnostics.
• Preserve server recommendation capabilities across Room upgrades.

Validation: 871 unit tests ran with no failures and one skipped. Lint, debug and release builds, and Android test APK assembly passed. Focused instrumentation suites passed on API 23 and API 34; unsupported UI cases were skipped.

Thanks to everyone testing TypeType and reporting problems.