Update display layout when requesting display rotate

Make sure to update DisplayLayout when a display rotate transition
requested, so the transition handler can get an updated display layout
when handling the transition.

Fix: 286507067
Test: Observed display layout updated when requesting a display rotate,
      and the split divider won't be offseted.
Change-Id: Ia6a47f3e155511ea2033e05be2d0e7d6877999e0