Add JVMTI breakpoint and SingleStep tests

Tests for functionality related to the can_generate_single_step_events
and can_generate_breakpoint_events jvmti capabilities.

Bug: 62821960
Test: ./test.py --host -j40
Test: ./test/run-test --host --jvmti-step-stress 001-HelloWorld
Test: ./test/run-test --host --jvmti-step-stress 914
Change-Id: Id2a4db5a6de3a97726f03f5e735c2bb77dafe4ca
46 files changed