Rewrite run-test scripts for `src-dex2oat-unresolved`.

Rename `src-dex2oat-unresolved/` to `src-aotex/` and compile
to `$TEST_NAME-aotex.jar`, so that it can be used together
with `src-ex/` which is compiled to `$TEST_NAME-ex.jar`.

Introduce `src-bcpex/`, compiled to `$TEST_NAME-bcpex.jar,
that is added to the boot class path at runtime but not for
AOT compilation.

Test: testrunner.py --host --jvm
Test: testrunner.py --target --optimizing
Bug: 203171409
Change-Id: Ic4751b743c2f53c8f4567ed35a4b14d0e7cac05a
15 files changed