Closer to notification model & updates on bubbles

* Introduces BadgedImageView / BadgeRenderer for icon & badging
  -> These are both semi-temporary until I move things over to using
     icon library

* Introduces "shouldShowInShade" bit on NotificationData, this is used
  to indicate whether a bubble's notification should display in the
  shade or not
* BubbleController uses NotificationEntryListener to annotate notifs
  bubble state & add / update / remove bubbles
* Cleans up expansion / dismissing / visibility in BubbleController

General notif / dot / bubble behaviour:
* When a bubble is posted, the notification is also in the shade and
  the bubble displays a 'dot' a la notification dots on the launcher
* When the bubble is opened the dot goes away and the notif goes away
* When the notif is dismissed the dot will also go away
* If the bubble is dismissed with unseen notif, we keep the notif in shade

go/bubbles-notifs-manual has more detailed behavior / my manual tests

Bug: 111236845
Test: manual (go/bubbles-notifs-manual) and atest BubbleControllerTests
Change-Id: Ie30f1666f2fc1d094772b0dc352b798279ea72de