Replace art_cts_jvmti_test_library filegroup with java_library

This is to allow the art_cts_jvmti_test_library to be exported as part
of the ART module exports.

Bug: 142947124
Test: atest -p cts/hostsidetests/jvmti
Change-Id: I7ce0c78b8f40d928798764d74add8dbff4353af8
1 file changed