[No QA] [TS Migration] Migrate 'focusWithDelay' lib to TypeScript

src/libs/focusWithDelay.js → src/libs/focusWithDelay.ts

@@ -1,15 +1,14 @@
-import {InteractionManager} from 'react-native';
+import {InteractionManager, TextInput} from 'react-native';
 import ComposerFocusManager from './ComposerFocusManager';
 
+type FocusWithDelayReturn = (shouldDelay?: boolean) => void;
 /**
  * Create a function that focuses a text input.
- * @param {Object} textInput the text input to focus
- * @returns {Function} a function that focuses the text input with a configurable delay
  */
-function focusWithDelay(textInput) {
+function focusWithDelay(textInput: TextInput | null): FocusWithDelayReturn {
     /**
      * Focus the text input
-     * @param {Boolean} [shouldDelay=false] Impose delay before focusing the text input
+     * Impose delay before focusing the text input
      */
     return (shouldDelay = false) => {
         // There could be other animations running while we trigger manual focus.
@@ -18,6 +17,7 @@ function focusWithDelay(textInput) {
             if (!textInput) {
                 return;
             }
+
             if (!shouldDelay) {
                 textInput.focus();
                 return;