Enhancement: specify HomePod by name in config

[justjam2013]

This is a suggested enhancement to specify the HomePod by name instead of by id in the plugin config. As a side effect, it will fiix the issue with the mac addresses changing in iOS 18.

In bin/stream.py replace:

    atvs = await pyatv.scan(self.loop, identifier=self.atv_identifier, timeout=5)

    if not atvs:
        self.logger.error("* No Device found")
        return False

    conf = atvs[0]

with a scan by protocol:

    from pyatv.const import Protocol

    ...
    atvs = await pyatv.scan(self.loop, protocol=Protocol.AirPlay, timeout=5)

    atvs[:] = [atv for atv in atvs if atv.name == self.homepod_name]
    if not atvs:
        self.logger.error("* No Device found")
        return False

    conf = atvs[0]

[justjam2013]

Using the HomePod name instead of the id, would create volume buttons with human readable names instead of using the id string.