add a version TXT record to adb secure mdns services

In the context of secure connect, allows adbd and host adb to reject
each other based on incompatible versions without even having to
actually connect (since it is a DNS TXT).

Bug: 111434128, 119490749

Test: N/A
Exempt-From-Owner-Approval: already approved
Change-Id: I54312d8b67370c397ba81ecdbca1b27e3ee58572