IDPROD-3501: Tint icons on consent screen for dark mode (#936)

Tint icons on consent screen with adaptive 
color so they're visible in dark mode.

StripeIdentity/StripeIdentity/Source/NativeComponents/Coordinators/VerificationSheetFlowController.swift

@@ -43,6 +43,7 @@ enum VerificationSheetFlowControllerError: Error, Equatable, LocalizedError {
     }
 }
 
+@available(iOS 13, *)
 final class VerificationSheetFlowController {
 
     let brandLogo: UIImage
@@ -60,6 +61,7 @@ final class VerificationSheetFlowController {
     }()
 }
 
+@available(iOS 13, *)
 @available(iOSApplicationExtension, unavailable)
 extension VerificationSheetFlowController: VerificationSheetFlowControllerProtocol {
     /// Transitions to the next view controller in the flow with a 'push' animation.
@@ -322,6 +324,7 @@ extension VerificationSheetFlowController: VerificationSheetFlowControllerProtoc
 
 // MARK: - IdentityFlowNavigationControllerDelegate
 
+@available(iOS 13, *)
 extension VerificationSheetFlowController: IdentityFlowNavigationControllerDelegate {
     func identityFlowNavigationControllerDidDismiss(_ navigationController: IdentityFlowNavigationController) {
         delegate?.verificationSheetFlowControllerDidDismiss(self)

StripeIdentity/StripeIdentity/Source/NativeComponents/IdentityUI.swift

@@ -51,6 +51,8 @@ struct IdentityUI {
         return UILabel.appearance().textColor ?? CompatibleColor.label
     }
 
+    static let iconColor = UIColor.systemGray
+
     // MARK: Separator
 
     static let separatorColor = CompatibleColor.separator

StripeIdentity/StripeIdentity/Source/NativeComponents/ViewControllers/BiometricConsentViewController.swift

@@ -9,6 +9,7 @@ import UIKit
 @_spi(STP) import StripeCore
 @_spi(STP) import StripeUICore
 
+@available(iOS 13, *)
 @available(iOSApplicationExtension, unavailable)
 final class BiometricConsentViewController: IdentityFlowViewController {
 
@@ -90,12 +91,12 @@ final class BiometricConsentViewController: IdentityFlowViewController {
         try htmlView.configure(with: .init(
             iconText: [
                 .init(
-                    image: Image.iconClock.makeImage(),
+                    image: Image.iconClock.makeImage().withTintColor(IdentityUI.iconColor),
                     text: consentContent.timeEstimate,
                     isTextHTML: false
                 ),
                 .init(
-                    image: Image.iconInfo.makeImage(),
+                    image: Image.iconInfo.makeImage().withTintColor(IdentityUI.iconColor),
                     text: consentContent.privacyPolicy,
                     isTextHTML: true
                 ),
@@ -116,6 +117,7 @@ final class BiometricConsentViewController: IdentityFlowViewController {
 
 // MARK: - Private Helpers
 
+@available(iOS 13, *)
 @available(iOSApplicationExtension, unavailable)
 private extension BiometricConsentViewController {
 
@@ -142,6 +144,7 @@ private extension BiometricConsentViewController {
 
 // MARK: - IdentityDataCollecting
 
+@available(iOS 13, *)
 @available(iOSApplicationExtension, unavailable)
 extension BiometricConsentViewController: IdentityDataCollecting {
     var collectedFields: Set<VerificationPageFieldType> {

StripeIdentity/StripeIdentity/Source/NativeComponents/Views/ErrorView.swift

@@ -13,7 +13,6 @@ class ErrorView: UIView {
         static let errorTitleLabelSpacing: CGFloat = 12
         static let contentInset: NSDirectionalEdgeInsets = .init(top: 132, leading: 16, bottom: 0, trailing: 16)
         static let warningIconImageSpacing: CGFloat = 27
-        static let warningIconTintColor: UIColor = .systemGray
     }
 
     struct ViewModel {
@@ -52,7 +51,7 @@ class ErrorView: UIView {
         let imageView = UIImageView()
         imageView.contentMode = .scaleAspectFit
         imageView.image = Image.iconWarning92.makeImage(template: true)
-        imageView.tintColor = Styling.warningIconTintColor
+        imageView.tintColor = IdentityUI.iconColor
         return imageView
     }()
 

StripeIdentity/StripeIdentityTests/Snapshot/BiometricConsentViewControllerSnapshotTest.swift

@@ -9,6 +9,7 @@ import Foundation
 import FBSnapshotTestCase
 @testable import StripeIdentity
 
+@available(iOS 13, *)
 final class BiometricConsentViewControllerSnapshotTest: FBSnapshotTestCase {
     static let mockVerificationPage = try! VerificationPageMock.response200.make()
 

StripeIdentity/StripeIdentityTests/Unit/NativeComponents/Coordinators/VerificationSheetFlowControllerTest.swift

@@ -13,6 +13,7 @@ import Vision
 
 private let mockError = NSError(domain: "", code: 0, userInfo: nil)
 
+@available(iOS 13, *)
 final class VerificationSheetFlowControllerTest: XCTestCase {
 
     let flowController = VerificationSheetFlowController(brandLogo: UIImage())
@@ -307,6 +308,7 @@ final class VerificationSheetFlowControllerTest: XCTestCase {
     }
 }
 
+@available(iOS 13, *)
 private extension VerificationSheetFlowControllerTest {
     func nextViewController(
         missingRequirements: Set<VerificationPageFieldType>,

StripeIdentity/StripeIdentityTests/Unit/NativeComponents/ViewControllers/BiometricConsentViewControllerTest.swift

@@ -9,6 +9,7 @@ import Foundation
 import XCTest
 @testable import StripeIdentity
 
+@available(iOS 13, *)
 final class BiometricConsentViewControllerTest: XCTestCase {
 
     static let mockVerificationPage = try! VerificationPageMock.response200.make()