fix: use the first available locale to decide directionality on Android (#53417)

Summary:
On iOS, if the default locale is not supported in the app, it will fall back to the first available locale to decide if RTL layout should be enabled or not; however on Android, we use the default locale. So if the first locale is a RTL locale and not supported by the app on Android, the app will fall back to the first available locale which might not be RTL, but the layout would be decided as RTL according to the default locale.

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[ANDROID] [FIXED] - use the first available locale instead of the default one to decide `isDevicePreferredLanguageRTL`

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[ANDROID] [FIXED] - use the first available locale instead of the default one to decide `isDevicePreferredLanguageRTL`

Pull Request resolved: #53417

Test Plan:
I set my phone's locale to this order: Hebrew, English and enabled RTL layout:
```
import { I18nManager } from 'react-native';

I18nManager.allowRTL(true);
I18nManager.swapLeftAndRightInRTL(true);
```

Prior to my PR, the app would use RTL layout with English on Android which doesn't make much sense (iOS is LTR + English). With my PR Android app will behave exactly the same as the iOS app.

Reviewed By: rshest

Differential Revision: D80821903

Pulled By: zeyap

fbshipit-source-id: c1bd9b45341c344833a8fdfacc2c786ee8437415

Author: Kaining Zhong

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/i18nmanager/I18nUtil.kt

@@ -63,7 +63,8 @@ public class I18nUtil private constructor() {
   private val isDevicePreferredLanguageRTL: Boolean
     // Check if the current device language is RTL
     get() {
-      val directionality = TextUtilsCompat.getLayoutDirectionFromLocale(Locale.getDefault())
+      val directionality =
+          TextUtilsCompat.getLayoutDirectionFromLocale(Locale.getAvailableLocales()[0])
       return directionality == View.LAYOUT_DIRECTION_RTL
     }