Add parsed options for heap min free, heap max free, target utilization.

Added options in runtime for heap min free, max free, and target utilization.

Change-Id: Iaea988ffbf6cb7f07127640786168de7d341f1e1
diff --git a/src/runtime.h b/src/runtime.h
index ba37f40..a6c662c 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -79,6 +79,9 @@
     size_t heap_initial_size_;
     size_t heap_maximum_size_;
     size_t heap_growth_limit_;
+    size_t heap_min_free_;
+    size_t heap_max_free_;
+    double heap_target_utilization_;
     size_t stack_size_;
     size_t jni_globals_max_;
     size_t lock_profiling_threshold_;