Update setup java

[litetex]

• I carefully read the contribution guidelines and agree to them.

What is it?

• Codebase improvement (dev facing)

Description of the changes in your PR

• Update actions/setup-java v1 to v2 (migration)
• Using adoptopenjdk instead of zulu
  • AdoptOpenJDK is unbranded (Zulu is branded)
  • AdoptOpenJDK is very close related to OpenJDK / less modified than zulu
  • There seem to be no specific commitments regarding the availability of Zulu's free constructions
  • Android studio is shipped with OpenJDK:
    
  • See also: Offer AdoptOpenJDK in addition to Zulu actions/setup-java#13, https://dzone.com/articles/java-and-the-jdks-which-one-to-use

[FireMasterK]

Could a matrix be used to test in OpenJ9 as well?

[litetex]

Could a matrix be used to test in OpenJ9 as well?

I wouldn't recommend that because the (default) JVM implementation 'HotSpot' is shipped by Oracle and therefore also included in the OpenJDK, which is used in Android Studio: