Support setting channel for SoftAP #2581

Job	Run time
Build RP2350 0	7m 8s
Build RP2350-RISCV 0	7m 10s
Build RP2350-RISCV 1	7m 1s
Build RP2350 1	6m 53s
Build RP2350-RISCV 2	7m 10s
Spelling, Style, Boards, Package	1m 7s
Build RP2350 2	7m 36s
Build RP2350-RISCV 3	7m 20s
Build 0	7m 22s
Build RP2350 3	7m 8s
Build RP2350-RISCV 4	8m 0s
Build 1	8m 5s
Build RP2350 4	7m 57s
Build RP2350-RISCV 5	7m 22s
Build 2	7m 53s
Mac (macOS-12)	1s
Build RP2350 5	7m 24s
Build 3	9m 6s
Mac (macOS-14)	2m 8s
Build 4	8m 0s
Build PlatformIO Examples	3m 24s
Build 5	7m 48s
Build TinyUSB Examples	4m 1s
Build Every Variant 0	6m 49s
Windows	3m 30s
Build Every Variant 1	6m 54s
	2h 44m 17s

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