Check UISwitch state using combination of trait and value

[NickEntin]

• [x] Add test cases showing this behavior
• [x] Check if the outputted values are localized by numeric script
• [x] Check what happens when the accessibilityValue is a non-0 or 1 numeric value

[NickEntin]

Check what happens when the accessibilityValue is a non-0 or 1 numeric value

From what I can tell there are three special cased values:

• 0 => "off"
• 1 => "on"
• 2 => "mixed"

I'm not sure what the last one is used for, but simple enough to support with the same pattern.

[NickEntin]

Check if the outputted values are localized by numeric script

Nope, looks like it's always 0 and 1

[NickEntin]

• [x] Update iOS 13 reference image from CI
• [x] Update localized descriptions for German
• [x] Update localized descriptions for Russian

[NickEntin]

Check what happens when the accessibilityValue is a non-0 or 1 numeric value

From what I can tell there are three special cased values:

• 0 => "off"
• 1 => "on"
• 2 => "mixed"

I'm not sure what the last one is used for, but simple enough to support with the same pattern.

Oh, VoiceOver probably shares logic with macOS, which has tri-state controls (e.g. checkboxes).