Make sure to extend insets frame when the bar layout with cutout

The private flag to let the layout system know the bar should extend its
requested size by the cutout size is not included in the insets
calculation, and the bar size will have a mis-match if they want to do
so. To modify the calculation of the insets to make them match.

Bug: 236101339
Test: See the bug
Test: atest DisplayPolicyInsetsTests
Change-Id: If76f3325196db7e8ab90d6dc56c9f67e0cd61ca9