Reverting the change to remove accessibility traits on the AttributedLabel (#597)

This reverts #590. During
integration testing, the original change caused KIF failures while
searching for labels with the `staticText` trait. The work to audit the
failures and make necessary code changes has been ticketed
[here](https://block.atlassian.net/browse/UI-9567).

This revert allows the changes in
#596 to be fully tested.

Author: johnnewman-square

BlueprintUICommonControls/Sources/AttributedLabel.swift

@@ -336,20 +336,18 @@ extension AttributedLabel {
         }
 
         private func updateAccessibilityTraits(with model: AttributedLabel) {
-            guard let traits = model.accessibilityTraits else {
-                accessibilityTraits = []
-                return
-            }
+            if let traits = model.accessibilityTraits {
 
-            var uiTraits = UIAccessibilityTraits(with: traits)
+                var traits = UIAccessibilityTraits(with: traits)
 
-            if uiTraits.contains(.updatesFrequently) {
-                /// `UILabel` has the `.staticText` trait by default.
-                /// If we explicitly set `.updatesFrequently` this should be removed.
-                uiTraits.subtract(.staticText)
-            }
+                if traits.contains(.updatesFrequently) {
+                    /// `UILabel` has the `.staticText` trait by default.
+                    /// If we explicitly set `.updatesFrequently` this should be removed.
+                    traits.subtract(.staticText)
+                }
 
-            accessibilityTraits = uiTraits
+                accessibilityTraits = traits
+            }
         }
 
         override func drawText(in rect: CGRect) {

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Revert applying empty accessibility traits to `AttributedLabel` if supplied traits is `nil`.
+
 ### Added
 
 ### Removed