This file is indexed.

/usr/share/alsa/alsa.conf.d/pulse.conf is in pulseaudio 1:4.0-0ubuntu11.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# PulseAudio alsa plugin configuration file to set the pulseaudio plugin as
# default output for applications using alsa when pulseaudio is running.
hook_func.pulse_load_if_running {
	lib "libasound_module_conf_pulse.so"
	func "conf_pulse_hook_load_if_running"
}

@hooks [
	{
		func pulse_load_if_running
		files [
			"/usr/share/alsa/pulse-alsa.conf"
		]
		errors false
	}
]