Bubble v2 animation change.

When expand/collapse, use RoundedRectRevealOutlineProvider to reveal/unreveal
from top left or top right corner. It's similar to app icon popup in Pixel 2.

And animate this together with bubble moving to the middle. Also reduce animation duration.

Bug: 67605985
Test: manual
PiperOrigin-RevId: 179435867
Change-Id: I58557f77d0db167dc9d2a2dadeb5bc4cfa16702f