its pretty simple, ive installed all the sdks up to api 35, and build tools including the latest build tool, i made sure that there were no holes in the android studio department, then i just did some basic tests with the ndks i downloaded in android studio, since every engine has the minimum, maximum ndk requirement thing, it can be used to set it up for specific builds.
so:
all sdk platforms installed for my convinience.
downloaded all build tools.
downloaded the required ndk for my specific engine version for testing out each.
downloaded all the android sdk command line tools. just for assurance sake.
and yeah thats it, just make sure android studio is all set up.
then you can do tests each ndk on each engine.