Merge "Prevent reiterating over same stack tasks when calculating running tasks"

        // Gather all of the tasks across all of the tasks, and add them to the sorted set

        mTmpSortedSet.clear();

        mTmpStackTasks.clear();

        final int numDisplays = activityDisplays.size();

        for (int displayNdx = 0; displayNdx < numDisplays; ++displayNdx) {

            final ActivityDisplay display = activityDisplays.valueAt(displayNdx);

            for (int stackNdx = display.getChildCount() - 1; stackNdx >= 0; --stackNdx) {

                final ActivityStack stack = display.getChildAt(stackNdx);

                mTmpStackTasks.clear();

                stack.getRunningTasks(mTmpStackTasks, ignoreActivityType, ignoreWindowingMode,

                        callingUid, allowed);

                for (int i = mTmpStackTasks.size() - 1; i >= 0; i--) {

                mTmpSortedSet.addAll(mTmpStackTasks);

            }

        }

        }

        // Take the first {@param maxNum} tasks and create running task infos for them

        final Iterator<TaskRecord> iter = mTmpSortedSet.iterator();

import java.util.ArrayList;

/**

 * runtest --path frameworks/base/services/tests/servicestests/src/com/android/server/am/RunningTasksTest.java

 * atest FrameworksServicesTests:RunningTasksTest

 */

@MediumTest

@Presubmit