Only update lastFocusedTaskDisplayArea if it handles orientation request

Before, when there are two DAGs, where one respects orientation request,
and one doesn't, the orientation request from the former DAG may be
ignored if the later DAG gets the focus.

Now, when the focus changed, we should only update to the new TDA if it
handles orientation change, otherwise we should still use the
orientation from the previous focused TDA.

Bug: 155431879
Test: manual: test with dual display where only one DAG respect request
Test: atest WmTests:TaskDisplayAreaTests
Test: atest WmTests:DisplayAreaTest
Change-Id: I1d38980347e65b5b729acd3457035e4d4b7cd1c0