Merge "Prevent IndexOutOfBoundsException while removing activities" into tm-qpr-dev

            // removed. Otherwise, shell transitions wouldn't run because there would be no event

            // that sets the transition ready.

            final boolean traverseTopToBottom = !mTransitionController.isShellTransitionsEnabled();

            forAllActivities((r) -> {

            final ArrayList<ActivityRecord> finishingActivities = new ArrayList<>();

            forAllActivities(r -> {

                if (r.finishing || (excludingTaskOverlay && r.isTaskOverlay())) {

                    return;

                }

                finishingActivities.add(r);

            }, traverseTopToBottom);

            for (int i = 0; i < finishingActivities.size(); i++) {

                final ActivityRecord r = finishingActivities.get(i);

                // Prevent the transition from being executed too early if the top activity is

                // resumed but the mVisibleRequested of any other activity is true, the transition

                // should wait until next activity resumed.

                } else {

                    r.destroyIfPossible(reason);

                }

            }, traverseTopToBottom);

            }

        }

    }