
Instead of recursively executing subflows which causes dead locks when they parent and subflows share the same executor we can instead flatten the parent and subflows into a single graph, composed with only tasks and run this instead, which will not have the issue of subflows dead locking, since after flattening there is no concept of a subflow. Fixes bug: 1225759 Change-Id: I79b9b194cd81e36ce75ba34a673e3e9d3e96c4cd