If recents view is not attached to window when applyLoadPlan is called, then the taskviews will never update until mTaskListChangeId is invalidated. This mainly affects RecentsWindowManager, so added a callback to only initialize after recents view has attached to window.
Flag: com.android.launcher3.enable_launcher_overview_in_window
Bug: 377678992
Test: pre/post-submit tests; opened overview several times
Change-Id: Ie430fb5b0b2b6870c12fed1c6a394088cad1ac17
Schneider Victor-Tulias
dbf9dee5a6