Revert^2 "Defer showing the expanded view for bubble bar"

8cb685f3

Flag: com.android.wm.shell.enable_bubble_bar
Fixes: 339683389
Test: manual
      - add new bubble that auto expands
      - observe expanded view shows when bubble bar starts expanding
Test: atest BubblesTest
Change-Id: I907601a98248847ca6ab2a48d8f8a1120bf57e20