When bubble bar gets recreated, store the expanded state and selected
bubble.
Allows us to show the bubble bar in previous state after rotation,
before shell has been able to send us an update.
Bug: 357115534
Test: on home screen, have bubble bar expanded, rotate device, check
bubble bar remains expanded
Test: in app, have bubble bar expanded, rotate device, check bubble bar
remains expanded
Test: have bubble bar collapsed, rotate device, check it is not expanded
Flag: com.android.wm.shell.enable_bubble_bar
Change-Id: Ied187c638287599297e15db77efdf44bd701d559
Ats Jenk
14474695a2