title: Keep the activity stack of a task when navigating from an activity
body: <p>I have two tasks, with their respective stack of activities:</p>
  
  <p>Task 1: A -> B -> C (foreground)</p>
  
  <p>Task 2: D -> E -> F (background)</p>
  
  <p>If from the recent list I go to Task 2, it returns to the foreground keeping its activity stack. If I do the same to return to Task 1, the behavior of the activity stack is the same, it's what I want!</p>
  
  <p>Now, I want to do the above but from an activity. For example, call from activity C (in Task 1) Task 2 with its stack intact.</p>
  
  <p>I tried calling D (FLAG_ACTIVITY_NEW_TASK) from C (in Task 1), but Task 2, as expected, returns to the foreground showing D, does not conserve the stack (Like when I access, from the recent list, to Task 2).</p>
  
  <p>Can I get what I want (... call from activity C (in Task 1) Task 2 with its stack intact)?</p>
  
  <p>Thank you.</p>