Bubble v2 dismiss changes.

Including:
- Smaller bottom action view
- Make gradient darker
- Text("hide" and "end call") not all caps
- Larger text size
- Padding between icon and text
- Speed up scaling and hiding animation
- Animate opacity together with scaling
- Show "Call ended" text in toast instead of bubble
Bug: 67605985
Test: NewBubbleTest
PiperOrigin-RevId: 181400165
Change-Id: I21b4dcc6324d2dc3eb41377d5264a391c116262f