Add a way to override the stack view expanded state

Have a bug where the stack view is already expanded when it's being
added back to the window. I haven't been able to figure out a clear
way this happens (suspect that the ime runnable isn't getting run
somehow so the stack view doesn't get collapsed before it's removed).

So this is an unfortunate band-aid fix. Hoping long term we can remove
the ime runnable being tied to collapsing/expanding (b/442010190)

Flag: com.android.wm.shell.fix_bubble_stack_view_expanded_when_added
Test: manual - add code to make stackview expanded incorrectly, remove
               it and add it back, verify that the expanded view
               doesn't show with stack collapsed & interactions with
               it should work normally
Bug: 417447385
Change-Id: I71f32171f8ec9a1f5b769d71b7b8042eec4f858e