iOS IAA bug

[OBO]

void handleInterAppAudioConnectionChange()
call audioDeviceAboutToStart when connected, but it doesnt call callback->audioDeviceStopped() when IAA is disconnected. So there is no way of knowing the IAA was disconnected.

[ed95]

https://github.com/WeAreROLI/JUCE/commit/de181762d2a5d8df55cc19898374ea320f85c186

[OBO]

Thanks!