Fix PIP exit animation flickering on non-match parent activity

It was regressed by [1], which assumes the visible frame are always from
(0, 0).

[1]: I13006f479868f731550b9c75d8f9927bda2592fe

Bug: 356277166
Fixes: 379653269
Test: atest BottomHalfExitPipToAppViaIntentTest BottomHalfExitPipToAppViaExpandButtonTest
Test: atest PipTaskOrganizerTest DesktopTasksLimiterTest DesktopRepositoryTest
Flag: EXEMPT bugfix
Change-Id: I5300b225e407cb01e25f5493b2a8cdeb905ee84c