Support follow-up queries for missing records

If an mDNS advertiser does not reply with the full set of
PTR+SRV+TXT+A+AAAA recors, send follow-up queries for the missing
records, instead of just repeating the PTR query.

See RFC6763 12., especially the last paragraph.

Bug: 267570781
Test: atest NsdManagerTest
Change-Id: I495db18d9d5770522482c76c7a8805f5612324aa
3 files changed