chore: Release 5.6.8

[onesignal-deploy]

Channels: Current

🛠️ Native Dependency Updates

• Update Android SDK from 5.9.8 to 5.9.9
  • chore(logger): adopt shared KMP logger module via OneSignal-KMP-SDK submodule (#2687)
  • chore(logger): gate otel-vs-logger switch on SDK_CUSTOM_LOGGING flag (#2688)
  • chore(logger): wire Android FileLogStore for shared KMP legacy purge (#2691)
  • chore(logger): log release-diagnostic info at SDK startup (#2692)
  • chore: emit Kotlin version on remote log resource attrs (#2713)
  • chore: adopt shared KMP feature-flags client and catalog (#2716)
  • fix: restrict notification component exports (#2659)
  • fix: forward PermissionsActivity theme fix (#2701)
  • fix: skip ShortcutBadger on API 26+ to prevent SIGSEGV on Xiaomi devices (#2570)
  • fix: destroy IAM WebView on dismiss to stop Activity leaks (#2706)
• Update iOS SDK from 5.5.5 to 5.5.6
  • fix: resolve TOCTOU race on the current user (OneSignal-iOS-SDK#1695)
  • fix: lock OSSubscriptionModel state to stop encode crashes (OneSignal-iOS-SDK#1694)
  • refactor: rebuild OperationRepo unmatched delta queue on flush (OneSignal-iOS-SDK#1693)