## What's Changed
* Display a question mark on switches with 'null' state by @mueller-ma in https://github.com/openhab/openhab-android/pull/3370
* Catch exception in AbstractTileService by @mueller-ma in https://github.com/openhab/openhab-android/pull/3371

**Full Changelog**: https://github.com/openhab/openhab-android/compare/3.5.1-beta...3.5.2-beta
