Revert "Accessibility: Restore element focus when a window closes"

This break VE dialogs as we already restore selection to the correct place with fragment.select(). Focus just resets the selection to 0.

This reverts commit 0447150c57c76da7b739c95b4706eaf515119a7c.

Bug: 66855
Change-Id: I6d17eeff8473d47a1e5a2cd53e73de734c45ff2c