[Enhancement] Add isiOSAppOnMac property

[VasenevEA]

Summary

With the release of computers on Apple Silicone, we got another platform on which the Xamarin application can run.
We need a simple way to find out which device we are running on:
iOS device or iOS on Mac

API Changes

add to DevicePlatform:

public static DevicePlatform iOSOnMac { get; } = new DevicePlatform(nameof(iOSOnMac));

Intended Use Case

if (DeviceInfo.Platform == DevicePlatform.iOSOnMac)
{
  //specific code
}

[jamesmontemagno]

Is available => https://stackoverflow.com/questions/65042788/how-to-detect-if-an-ios-app-is-running-on-an-m1-mac

I don't think it should be the device platform though to be honest with you as it would break a bunch of logic trees.

[jamesmontemagno]

I think we want to return "Desktop" for DeviceType in this case.

So you could do:

If(DeviceInfo.Platform == DevicePlatform.iOS && DeviceInfo.DeviceType == DeviceType.Desktop) { }

[jamesmontemagno]

Also need to coordinate with XF team

[VasenevEA]

I think we want to return "Desktop" for DeviceType in this case.

So you could do:

If(DeviceInfo.Platform == DevicePlatform.iOS && DeviceInfo.DeviceType == DeviceType.Desktop) { }

It will be great!