Update bounds on display rotation

Make sure we properly update the PiP bounds
upon display rotation while already in PiP.

Bug: 357004254
Flag: com.android.wm.shell.enable_pip2_implementation
Test: atest WMShellFlickerTestsPip1:ShowPipAndRotateDisplay
Test: enter PiP and rotate display with home rotation enabled
Change-Id: Ic0444c36d7c6a64a9fb2cf196355a6954961a2a3