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
diff --git a/tests/Android.bp b/tests/Android.bp
index 8b3e8b1..337e4f4 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -17,4 +17,7 @@
     "pointer/1.0",
     "pointer/1.0/default",
     "pointer/1.0/default/lib",
+    "versioning/1.0",
+    "versioning/2.2",
+    "versioning/2.3",
 ]