ESPmDNS: Add method for querying discovered service name #2835

Job	Run time
Push event file	2s
Generate matrix	4s
Build (validation, esp32c3) / Build validation tests for esp32c3	2m 57s
Build (validation, esp32c6) / Build validation tests for esp32c6	3m 26s
Build (validation, esp32) / Build validation tests for esp32	4m 28s
Build (validation, esp32p4) / Build validation tests for esp32p4	2m 41s
Build (validation, esp32s3) / Build validation tests for esp32s3	4m 53s
Build (validation, esp32h2) / Build validation tests for esp32h2	2m 49s
Build (validation, esp32s2) / Build validation tests for esp32s2	3m 57s
QEMU	0s
Hardware	0s
	25m 17s

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