when the Bluetooth device disconnecting audioDeviceDidChangeWithFreshAudioDeviceList not triggering (only in IOS)

```
- (void)audioDeviceDidChangeWithFreshAudioDeviceList:(NSArray * _Nonnull)freshAudioDeviceList
{
NSLog(@"test-ActiveAudio-list freshAudioDeviceList");
[_bridge configureActiveAudioDevice:freshAudioDeviceList];
}
```
Some times above function does not trigger when the Bluetooth device disconnects/turns off the Bluetooth
, but it triggers when the Bluetooth device connecting

**Test environment Info (please complete the following information):**
- Device: iPhone 7
- OS: IOS 15.6.1
- Version amazon-chime-sdk:0.21.2
- Version amazon-chime-sdk-media: 0.17.2

Start at audioDeviceDidChangeWithFreshAudioDeviceList: and reproduce the Bluetooth disconnect case on the reported iPhone 7 and iOS 15.6.1 environment. Compare the callback behavior for connecting versus disconnecting, and verify that the audio device list is updated when Bluetooth is turned off.

Written by the indexing model from the issue text.