fix: Reinstate EditPostActivity's previous configChanges settings

This was modified for GutenbergKit's WebView, but is no longer necessary
now that GutenbergKit is managed by a separate GutenbergKitActivity.

#21662

Author: dcalhoun

WordPress/src/main/AndroidManifest.xml

@@ -288,8 +288,7 @@
         <!-- Posts activities -->
         <activity
             android:name=".ui.posts.EditPostActivity"
-            android:configChanges="screenLayout|orientation|screenSize
-      |keyboard|keyboardHidden|smallestScreenSize"
+            android:configChanges="locale|orientation|screenSize"
             android:theme="@style/WordPress.NoActionBar.NoEdgeToEdge"
             android:windowSoftInputMode="stateHidden|adjustResize"
             android:exported="false">