Doesn't re-sort app windows when move task to top

To avoid app window isn't moved by new task order when move task to top

Change-Id: I5f8a901bb2f20a163b7fa0a59d1dc58c1fca5f1f
Signed-off-by: tingna_sung <tingna_sung@htc.com>
Merge "Doesn't re-sort app windows when move task to top"
Merge pull request #1 from android/master

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