Convert libcore tests to Android.bp

Bug: 71899243
Test: m checkbuild
Test: atest CtsLibcoreTestCases
Test: atest CtsLibcoreJsr166TestCases
Test: atest CtsFileSystemTestCases
Test: mmma libcore EXPERIMENTAL_USE_OPENJDK9=true
Change-Id: Ic41b671055f1c9c802e5b7fc9f70c17da7be4e7d
3 files changed