Update bubble notification dot drawing

The notification dot drawing state depends on changes in the bubble
bar, so the bubble bar now directly requests updates to the dot at
specific states.

Flag: com.android.wm.shell.enable_bubble_bar
Fixes: 351904597
Fixes: 350782375
Test: atest BubbleViewTest
Test: manual basically just hammering on it trying to break it
       1. Dot appears for new bubble in all states of the bar
       2. Expand bubble bar
          - Dot is removed for selected and shows for others
            that have a dot
       3. After removing bubble while expanded
          - Dot is removed from newly selected bubble
       4. Collapse bubble bar
          - Dot is hidden for all bubbles
       5. Dot removed after tapping on a bubble when expanded

Change-Id: I4a940d38a8c77bddaf058b7ef882bab06886bcf4