Convert xplat/js/react-native-github/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/SelectionWatcher to Kotlin

Convert xplat/js/react-native-github/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/SelectionWatcher to Kotlin #9270