preferred media devices follow-up

[Antreesy]

• this._fallbackAudioInputId can be omitted given that we have the list now, but let's do it next time.
• add test coverage
• check, what else could affect and select wrong audio input
• Add showWarning for changes / fallback / preferences (outside of modal) - coudl be also handled by Media is disabled during a call when changing to a different device #7025
• check why audio/video might be disabled on device change during call - Media is disabled during a call when changing to a different device #7025
• replace console.log

Originally posted by @DorraJaouad in #11936 (comment)