Added WiFi Bandwidth Setting Methods for AP and STA modes.

[gonzabrusco]

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Description of Change

Now you can control the bandwidth of the WiFi in AP and STA modes. Before this change, the WiFi always defaulted to HT40 (at least on my ESP32). Not you can control if you want to use HT20 or HT40. This is not tested, but I expect the HT20 working mode to have a better range.

Tests scenarios

I tested this on a devkit and also on a custom board with an ESP32.

Related links

#6624

[mrengineer7777]

As a side effect this also starts SoftAP (AP) or WiFi (STA) modes. I vote for checking WiFi.mode() rather than starting AP or STA.

[gonzabrusco]

I did this that way because if SoftAP or STA is not enabled, then the bandwidth IDF call gets ignored. I expected that if somebody is setting the WiFi bandwidth, then I guess it's about to use it... so why not enable it? That's what other methods in these classes do.

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