Add tests for minor version upgrade enforcement.

Test: compiles
Test: add folder test/versioning/2.0 will make update-makefiles.sh to
fail.
Test: removing @2.3::IBar will let update-makefiles.sh to pass.
Test: Change @2.3::IBar to extend from @2.2::IFoo will let
update-makefiles.sh to fail.

Bug: 28825532
Change-Id: Iad1138b784505c903ab1049f08f6c07c38b777e1