tree a9b930906cad51aeee22d1f29ddb9476f0483222
parent 66b1cc96753fb078b879e2a05fcc1fc906106210
author Winson Chung <winsonc@google.com> 1562697230 -0700
committer Winson Chung <winsonc@google.com> 1562716166 -0700

Copy resume callbacks list prior to making callbacks

- Starting a deferred activity can trigger a new callback to be added
  to the list while we are iterating it

Bug: 136613192
Change-Id: I6690ab0695bb73f11bf343fb41e9fc86b4afec1b