NOTE TO SELF:
Signing packages failed. java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool has been compiled by a more recent version of Java Runtime(class file version 53.0), this version of the Java Runtime only recognizes class file versions of up to 52.0
https://stackoverflow.com/questions/60441090/apksignertool-issue-with-java-version
Confirmed Solution: . I solved it removing version 30.0.0 (rc2) of android build tools