[Android] Hostname in nsdmnager is not compliant with matter

[yunhanw-google]

In pixel 7, we see nsdManager is advertising host name with 40bytes, in android nsdManager, there is no API to set this hostname. The below is avahi-browse -r _matter._tcp = wlan0 IPv6 B6071280809E4E17-000000000001B669 _matter._tcp local hostname = [Android_25101c8afe6a479387b1d63318378d56.local] address = [192.168.0.102] port = [58586]

During ICD check-in validation, we see the mdns advertisment from android cannot be resolved in lit icd board because of the the above length issue so that lit cannot send the check-in message, In order to resolve this issue, we expand the kHostNameMaxLength to 40 in dnssd for workaround

But it would violate the matter spec description as below "For DNS‑SD a target host name is required, in addition to the instance name. The target host name SHALL be constructed using one of the available link-layer addresses, such as a 48-bit device MAC address (for Ethernet and Wi‑Fi) or a 64-bit MAC Extended Address (for Thread) expressed as a fixed-length twelve-character (or sixteen-character) hexadecimal string, encoded as ASCII (UTF-8) text using capital letters, e.g., B75AFB458ECD.. "

Potential solution:

1. Modify the matter spec to adapt with android requirement.
2. Extend a new API in android nsdmanager to set the hostname