Allow configuration of showing country flags

[goergisn]

Summary

In the country/region picker for the payment form, you can now choose if the images of flags are shown.

Components

let cardConfiguration = CardComponent.Configuration()
cardConfiguration.style.addressStyle.showCountryFlags = true/false
let cardComponent = CardComponent(paymentMethod: paymentMethod,
                                  context: context,
                                  configuration: cardConfiguration)

Drop-In

var style = DropInComponent.Style()
style.formComponent.addressStyle.showCountryFlags = cardSettings.showsCountryFlags
let dropInConfiguration = DropInComponent.Configuration(style: style)
let dropInComponent = DropInComponent(paymentMethods: paymentMethods,
                                      context: context,
                                      configuration: dropInConfiguration)

Also

• Adds a configuration to show/hide the flags in the Demo app
• Adds tests for flag visibility

List (showing flags)	Settings (enabled)

List (no flags)	Settings (disabled)

[neelSharma12]

You need to add PR description with new tag as this is a new addition.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
89.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud