Fix Assist audio player audio session setup (#2795)

<!-- Thank you for submitting a Pull Request and helping to improve Home
Assistant. Please complete the following sections to help the processing
and review of your changes. Please do not delete anything from this
template. -->

## Summary
<!-- Provide a brief summary of the changes you have made and most
importantly what they aim to achieve -->

## Screenshots
<!-- If this is a user-facing change not in the frontend, please include
screenshots in light and dark mode. -->

## Link to pull request in Documentation repository
<!-- Pull requests that add, change or remove functionality must have a
corresponding pull request in the Companion App Documentation repository
(https://github.com/home-assistant/companion.home-assistant). Please add
the number of this pull request after the "#" -->
Documentation: home-assistant/companion.home-assistant#

## Any other notes
<!-- If there is any other information of note, like if this Pull
Request is part of a bigger change, please include it here. -->

Sources/App/Assist/Audio/AudioPlayer.swift

@@ -1,5 +1,6 @@
 import AVFoundation
 import Foundation
+import Shared
 
 protocol AudioPlayerProtocol {
  func play(url: URL)
@@ -10,6 +11,15 @@ final class AudioPlayer: NSObject, AudioPlayerProtocol {
  private let player = AVPlayer()
 
  func play(url: URL) {
+ do {
+ let audioSession = AVAudioSession.sharedInstance()
+ try audioSession.setActive(false)
+ try audioSession.setCategory(.playback)
+ try audioSession.setActive(true)
+ } catch {
+ Current.Log.error("Failed to setup audio session for audio player: \(error.localizedDescription)")
+ }
+
  let playerItem = AVPlayerItem(url: url)
  player.replaceCurrentItem(with: playerItem)
  player.play()