Merge "Remove lock from FetchAudioProvider." into main

  if (provider_ != nullptr) {

    log::warn("refetch");

  }

  // Prevent other access to the AIDL if currently fetching new service

  std::lock_guard<std::mutex> guard(internal_mutex_);

  // Retry if audioserver restarts in the middle of fetching.

  // When audioserver restarts, IBluetoothAudioProviderFactory service is also

  // re-registered, so we need to re-fetch the service.