Improve logging for minMdns

[tcarmelveilleux]

Problem

• minmdns has Replying to DNS-SD service listing request log that is not actually
  correct: it occurs even if no messages get sent, and too frequently, in a way that is
  not helpful.
• Identity of querier that caused the query to be processed is missing, but very useful
  to understand network patterns.

Change overview

• Remove duplicate log lines that falsely indicated
  sending when it was just building responses
• When responding, clarify the identity of the querier
  that caused the response to be generated and sent

Testing

• Unit tests ran
• Ran unit tests and all-clusters-app commissioning on Linux

[github-actions]

Size increase report for "esp32-example-build" from c0ba6b1

File	Section	File	VM
chip-all-clusters-app.elf	.flash.text	4	4
chip-all-clusters-app.elf	.flash.rodata	-24	-24

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
.debug_info,0,245
.debug_loc,0,183
.debug_line,0,101
.debug_ranges,0,48
.debug_abbrev,0,36
[Unmapped],0,20
.debug_str,0,17
.flash.text,4,4
.riscv.attributes,0,2
.debug_frame,0,-4
.flash.rodata,-24,-24