Supports using the camera while multitasking.

[shogo4405]

Description & motivation

Added support for iOS Multitasking Camera Access.
https://developer.apple.com/documentation/avfoundation/avcapturesession/ismultitaskingcameraaccesssupported

This feature can be used under the following conditions

1. The app is running in Picture in Picture (PiP) mode.
2. The conditions described in the following documentation are met:
   https://developer.apple.com/documentation/avfoundation/avcapturesession/ismultitaskingcameraaccesssupported#discussion

await mixer.configuration { session in
  if session.isMultitaskingCameraAccessSupported {
    session.isMultitaskingCameraAccessEnabled = true
  }
}

Type of change

• Bug fix (non-breaking change which fixes an issue)

Screenshots: