tl;dr from the article:
- Auracast is a feature of the Bluetooth LE Audio standard that enables broadcasting audio to nearby devices.
- Android added basic support for Bluetooth LE Audio in Android 13, including support for starting and connecting to audio streams.
- Android 15 could get a dedicated page for audio sharing, signaling that Auracast could be a key feature of the new OS.
Screenshots from the article of how the feature would look like:
I dont think security fixes are unstable. Google pushes those updates to Pixels and they never break.
Sorry but this is just a case of too slow security patches. It may not be very problematic for your threat model, and GrapheneOS is very secure here, but better safe than sorry