[ESP32] Replace undefined variable 'type' with 'service->mType'

[Jerry-ESP]

There is an undefined variable "type" in the code, it cause build error when use platform mdns.
So I changed the variable to "service->mType"

[github-actions]

PR #25393: Size comparison from eff5773 to 765c578

Decreases (1 build for cc32xx)

platform	target	config	section	eff5773	765c578	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL	.debug_info	20262893	20262891	-2	-0.0

Full report (1 build for cc32xx)

platform	target	config	section	eff5773	765c578	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	643465	643465	0	0.0
			(read/write)	203688	203688	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197088	197088	0	0.0
			.comment	194	194	0	0.0
			.data	1480	1480	0	0.0
			.debug_abbrev	930167	930167	0	0.0
			.debug_aranges	87336	87336	0	0.0
			.debug_frame	300024	300024	0	0.0
			.debug_info	20262893	20262891	-2	-0.0
			.debug_line	2657207	2657207	0	0.0
			.debug_loc	2799993	2799993	0	0.0
			.debug_ranges	282240	282240	0	0.0
			.debug_str	3023883	3023883	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	105929	105929	0	0.0
			.shstrtab	232	232	0	0.0
			.stab	204	204	0	0.0
			.stabstr	441	441	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	378514	378514	0	0.0
			.symtab	256560	256560	0	0.0
			.text	535412	535412	0	0.0