These variables are published by config.go for use inside
.mk scripts. They are suitable for rules that need to be
pinned to a particular java/javac version because they do
not (yet) support the other.
Bug: 70286093
Test: Treehugger
Change-Id: Id407fca187fdf6c1947fc9d1ed7cd634fe089384
Merged-In: Id407fca187fdf6c1947fc9d1ed7cd634fe089384