Updates to required setup for Android NDK 21 in Unreal Engine 4.25

About Android NDK 21 in Unreal Engine 4.25?
I noticed the Android Folder is missing in (Open Engine/Extras/Android).

How I get the Android Folder and the files inside it.
I deleted the version 4.25 and reinstalled it again, Same problem Android folder is missing.

setup unreal sdk and jdk and ndk :