1) Go to: https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html
2) Download jdk-11.0.20_windows-x64_bin.exe
3) Run the file & install jdk 11.
3) Copy location of jdk-11 (example C:/Program Files/Java/jdk-11 in my case) and paste into Unreal Engine’s ‘Platforms – Android SDK’ setting as shown.