Base stuff on Bubble rather than NotifEntry; move stuff into Bubble

* BubbleView & BubbleExpandedView now go off of a Bubble rather than a NotificationEntry
* moved getUpdateMessage off of NotifEntry and into Bubble (also moves tests to new BubbleTest)
* moved height & settings intent lookups out of BubbleExpandedView and into Bubble

Bug: 135214687
Test: atest BubbleControllerTest BubbleDataTest BubbleTest
Change-Id: I1c5970c3cd00fb4f0136850daea3c9699a939f94