Add Jvmti Suspend/ResumeThread functions

Enable the can_suspend jvmti capability and implement all required
functionality associated with it.

Test: ./test.py --host -j40
Bug: 34415266
Bug: 62821960
Bug: 63579748

Change-Id: I83b92de7f81622e1658114b034918e8295805b6e
diff --git a/test/1903-suspend-self/info.txt b/test/1903-suspend-self/info.txt
new file mode 100644
index 0000000..779becc
--- /dev/null
+++ b/test/1903-suspend-self/info.txt
@@ -0,0 +1 @@
+Test jvmti suspend/resume of the current thread.