Fix the regression of PiP position in fixed rotation

This also fixes issue with rotating on tablets where PiP might go out
of bounds.

What happens is sometimes the rotation of screen has not issued the
callback yet and onInsetsChanged gets called causing regression and
mixing up all calculations based on the configuration change that
is being applied too early. Basically ordering issue of callbacks.

Bug: 254869973
Test: manually, tried with logs statements that confirmed it works as expected
regardless of the order in which the events callbacks are received

Change-Id: Ie1ac5e94559643028229c7829b35905b175425d2