Pip entry bounds incorrect upon rotation

Fix pip entry bounds upon orientation change
through rotation by making sure display layout
is updated for PipSizeSpecHandler as needed

Bug: 268108022
Bug: 267424412

Test: atest WMShellFlickerTests:EnterPipToOtherOrientationTest
Test: reproduce by following the steps in b/268108022
Change-Id: I4ea13550de248b1a82ea66fdc0187dbe0e656dcf