Update logic to check two pane resolution

Prior to this cl, we checked the app bounds for deciding
app in two pane or not. However, this might be broken in some certain
sceanrios.
Currently, api will check the entire task bounds.
If the width of task bounds is larger than two pane criteria,
then we treat it as in two pane mode.

Test: Highlighted behavior works correct.
Fix: 203763572
Change-Id: Ib14851b1e3e097328874c7956bb653f50820f877