Export NDK root

[pljones]

Short description of changes

Fixes failing Android build.

Context: Fixes an issue?

Fixes failing Android build.

Does this change need documentation? What needs to be documented and how?

No

Status of this Pull Request

Android build attached to 3.9.0 release.

What is missing until this pull request can be merged?

Confirmation from someone other than me that it works ("worked for me").

Checklist

• I've verified that this Pull Request follows the general code principles
• I tested my code and it does what I want
• My code follows the style guide
• I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• I've filled all the content above

[pljones]

I'd also strongly suggest moving off Java 8 onto the latest release that Github supports.

[ann0see]

Sometimes it's that easy...

Yes, we can move off java 8, but not for 3.9.0. Ok I just saw that you already released the apk.

[hoffie]

If it is now required to be exported, that's fine. When I last touched this logic, I was aiming to only export what's necessary in order to have a clearer boundary.
Either requirements have changed or it happened to work by accident due to similar versions between us and GH (which would mean that the previous code was wrong anyway).

[hoffie]

I'd also strongly suggest moving off Java 8 onto the latest release that Github supports.

Seconded, but I think that certain Android build tools require certain Java versions. Updating Java might imply updating other components which might imply dropping support for older platform levels, so we should check closely.