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any android phone is going to be sending these packets. Its a multicast packet going to the broadcast address of the network. Your laptop, having SSDP enabled, is listening for these packets. SSDP is enabled by default on windows computers. And the packet basically says, hey if you wanna cast a video to a google device, im here and im available.
Also, cell phones for many years now have connected (by default) to wireless networks using a randomized spoofed MAC addresses back address so they arent to be getting tracked at all the random hotspots people connect to. This is why the device's mac is not registered.

Drawing conclusions of technical things based on the name alone is going to drive you crazy. keep an non-biased mindset and research things prior to drawing any conclusions. Non-biased meaning, dont google "dial protocol someone is hacking me" and expect to NOT find people saying to beware of dial and its malware etc... Look more for "what is dial multiscreen org". And you will find the answers you are looking for.