Add SuspendReason enum and change Suspension functions.

More self-documenting and more type safe.

Bug: 62821960
Test: ./test.py
Change-Id: Ic7a1ae6a25e687d65f5aa10c1aad54a7b80dd086
diff --git a/runtime/openjdkjvm/OpenjdkJvm.cc b/runtime/openjdkjvm/OpenjdkJvm.cc
index 0b93b07..4560dda 100644
--- a/runtime/openjdkjvm/OpenjdkJvm.cc
+++ b/runtime/openjdkjvm/OpenjdkJvm.cc
@@ -422,14 +422,17 @@
   // Take suspend thread lock to avoid races with threads trying to suspend this one.
   art::Thread* thread;
   {
-    thread = thread_list->SuspendThreadByPeer(jthread, true, false, &timed_out);
+    thread = thread_list->SuspendThreadByPeer(jthread,
+                                              true,
+                                              art::SuspendReason::kInternal,
+                                              &timed_out);
   }
   if (thread != NULL) {
     {
       art::ScopedObjectAccess soa(env);
       thread->SetThreadName(name.c_str());
     }
-    thread_list->Resume(thread, false);
+    thread_list->Resume(thread, art::SuspendReason::kInternal);
   } else if (timed_out) {
     LOG(ERROR) << "Trying to set thread name to '" << name.c_str() << "' failed as the thread "
         "failed to suspend within a generous timeout.";