AI-generated Key Takeaways
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          GMSVoiceGuidanceAudioDeviceTypeis an enum used to control audio output for voice guidance.
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          It offers two options: builtInOnlyrestricts audio to the device's built-in speaker or headphones, whilebluetoothprioritizes Bluetooth but falls back to the built-in audio if unavailable.
GMSVoiceGuidanceAudioDeviceType
enum GMSVoiceGuidanceAudioDeviceType : NSInteger {}Determines what type of audio devices voice guidance may be played through.
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                  Voice guidance plays only through the built-in device speaker or headphones. DeclarationSwift case builtInOnly = 0Objective-C GMSVoiceGuidanceAudioDeviceTypeBuiltInOnly = 0
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                  Voice guidance plays over a bluetooth connection if available, else it uses the built-in device speaker or headphones. DeclarationSwift case bluetooth = 1Objective-C GMSVoiceGuidanceAudioDeviceTypeBluetooth