run-test: Build against libcore for Android device and host targets.

--jvm will build against the RI bootclasspath
--host will build against the host libcore bootclasspath
(implied --target) will build against the target libcore bootclasspath

Also fix other tests that were relying on building against OpenJDK.

Bug: 72491947
Test: art/test/testrunner/testrunner.py --jvm
Test: art/test/testrunner/testrunner.py --host
Change-Id: Ib7ce6740cda544797604200341578f8191f4b2b4