fix: Prevent old hack causing dictation issues (#49056)

By confining the hack to iOS 16 or above, we fix an issue with dictation causing content loss in later versions of iOS.

packages/react-native-aztec/ios/RNTAztecView/RCTAztecView.swift

@@ -100,8 +100,14 @@ class RCTAztecView: Aztec.TextView {
     /// the dictation engine refreshes the TextView with an empty string when the dictation finishes.
     /// This helps to avoid propagating that unwanted empty string to RN. (Solving #606)
     /// on `textViewDidChange` and `textViewDidChangeSelection`
-    private var isInsertingDictationResult = false
-
+    private var isInsertingDictationResult: Bool = {
+        if #available(iOS 16, *) {
+            return true;
+        } else {
+            return false;
+        }
+    }()
+
     // MARK: - Font
 
     /// Flag to enable using the defaultFont in Aztec for specific blocks
@@ -358,10 +364,14 @@ class RCTAztecView: Aztec.TextView {
     }
 
     public override func insertDictationResult(_ dictationResult: [UIDictationPhrase]) {
-        let objectPlaceholder = "\u{FFFC}"
         let dictationText = dictationResult.reduce("") { $0 + $1.text }
-        isInsertingDictationResult = false
-        self.text = self.text?.replacingOccurrences(of: objectPlaceholder, with: dictationText)
+        if #available(iOS 16, *) {
+            insertText(dictationText)
+        } else {
+            let objectPlaceholder = "\u{FFFC}"
+            isInsertingDictationResult = false
+            self.text = self.text?.replacingOccurrences(of: objectPlaceholder, with: dictationText)
+        }
     }
 
     // MARK: - Custom Edit Intercepts