Fixes an issue in large screen layouts where the task order was
incorrectly being recalculated and the user would see their previous
tasks swap places.
Fix: 352308373
Test: Manual. In tablet view, open several apps, go to Overview, dismiss
a task so the top row order changes, then swipe down the current
focused task to resume. Observe order stays the same.
Flag: EXEMPT bugfix
Change-Id: Ic59e3125f69d36ba32d13436dba872f4d3a3d0df
samcackett
0337520c7f